state aid operations chapter 8820 produced by srf consulting

State Aid Operations Chapter 8820Visualization Tool

State Aid Operations – Chapter 8820 Prepared by the State Aid Design Advisory CommitteeThe Committee is led by the Minnesota Department of Transportation (MnDOT) Division of State Aid for Local Transportation (SALT) and supported by a consulting team. Anoka County, County Engineer Carver County, County Engineer Cass County, County Engineer Jackson County, County Engineer Kanabec County, Public Works DirectorPolk County, County Engineer Washington County, Traffic EngineerCity of Alexandria, Consultant Engineer City of Coon Rapids, City EngineerCity of Duluth, City EngineerCity of St. Louis Park, Engineering Director City of Roseville, City EngineerMnDOT District 1, District State Aid EngineerMnDOT Metro, District State Aid Engineer MnDOT Metro, District State Aid Assistant SALT, Pre-Construction CoordinatorWSB, Consultant City Engineer

Produced by SRF Consulting

August 2021To be used with Chapter 8820 (printed Feb 2018)

Published by:

Minnesota Department of Transportation Office of Research & Innovation 395 John Ireland Boulevard, MS 330 St. Paul, MN 55155

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Introduction

The ToolThis tool is a supplementary resource to be used in conjunction with Chapter 8820 (printed Feb 2018). The information in the most up to date version of Chapter 8820 supersedes any conflict-ing provisions in this tool. The purpose of the tool is to provide additional guidance to agencies designing their State Aid system. It includes a visualization for each chart in Chapter 8820 with considerations to changes in design elements and more challenging concepts. The Tool also fur-ther demonstrates the flexibility within State Aid Standards. The visualizations provides general cross sections and plan views of the roadways, but it is the agencies’ responsibility to determine the right elements in the charts to use.

Chapter 8820Chapter 8820, when paired with other resources, such as the State Aid Manual, tech memos, and other applicable statutes provides a flexible framework for project planning, development and construction.

This has provided a safe, connected, consistent and coordinated system, built around the chang-ing needs of the citizens of Minnesota.

CONTINUE

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Table of Contents

Navigating the Tool ...................................................................................................................iv

How to Use this Tool ...............................................................................................................1-1Major Decision Definitions ............................................................................................................................................1-2Step 1 – Determine which Decision Tree to Use ......................................................................................................... 1-3Step 2 – Follow the Prompts through the Decision Tree. ...........................................................................................1-4Step 3 – View the Corresponding Chart and Visualization ........................................................................................ 1-5

Decision Tree - Rural/Suburban Roadway Projects ..................................................................2-18820.9920 Minimum Design Standards; Rural and Suburban Undivided; New or Reconstruction Projects ...........2-28820.9926 Minimum Design Standards: Rural and Suburban Undivided; Reconditioning Projects........................ 2-4

Decision Tree - Urban Roadway Projects ................................................................................ 3-18820.9936 Minimum Design Standards, Urban; New or Reconstruction Projects .................................................. 3-28820.9941 Minimum Design Standards: On-Road Bicycle Facility for Urban; New or Reconstruction Projects .... 3-58820.9941 Minimum Design Standards: On-Road Bicycle Facility for Urban; New or Reconstruction Projects .... 3-78820.9946 subpart. 1. Minimum Design Standards, Urban; Reconditioning Projects -Two-way Streets ...............3-88820.9951 Minimum Design Standards, On-Road Bicycle Facilities for Urban; Reconditioning Projects ............ 3-13

Decision Tree - Environmental Route Projects ........................................................................ 4-18820.9981 Subpart Type 1. Route Minimum Design Standards: National Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; New or Reconstruction Projects .........................................................................................................................................................................4-28820.9981 Subpart Type 2. Route Minimum Design Standards: National Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; New or Reconstruction Projects ........................................................................................................................................................................4-48820.9981 Subpart Type 3. Route Minimum Design Standards: National Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; New or Reconstruction Projects ........................................................................................................................................................................4-68820.9986 Minimum Design Standards: Natural Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; Reconditioning Projects .................................4-8

Decision Tree - Other Typical Projects ................................................................................... 5-18820.9922 Minimum Design Standards; New Bridge, Bridge Replacement, or Bridge Rehabilitation Projects and Approach Roadways on Rural or Suburban Undivided Roadways that are Not on the State-Aid System ............. 5-28820.9956 Minimum Vertical Clearances for Underpasses .......................................................................................5-48820.9961 Minimum Design Standards for 45- Degree and 60-Degree Pull-In Diagonal Parking .......................... 5-58820.9995 Minimum Off-Road and Shared Use Path Standards............................................................................... 5-7

Speed and ADT Definitions .................................................................................................... A-1

Major Decision Definitions .................................................................................................... A-2

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Navigating the Tool

Major Decision Definitions Step 2: Follow the prompts through the decision tree

Step 1: Determine which decision tree to use

Step 3: View the corresponding chart and visualization

OTHER TYPICAL PROJECTS

ENVIRONMENTAL ROUTE PROJECTS

URBAN ROADWAY PROJECTS

RURAL/SUBURBAN ROADWAY PROJECTS

HOW TO USE THIS TOOL

Navigate through the five sections using the main tabs located at the top of each page (see diagram at right). Sub-sections are located below the main tabs in gray. Explore these sub-sections, when applicable.

The Content Links provide access to supporting doc-uments and websites to help you throughout the pro-cess (see sidebar). Content Links will open new docu-ments or bring you to documents located on external websites.

The Home button navigates to the Table of Contents. Use the Back/Next buttons to step through the Tool in either direction. The Section Location indicates your current location within the Tool.

How to Use this Tool(1 of 10)

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Click Main Tabs to jump between sections

Click Secondary Tabs to jump between

sub-sections

Content Links provide access to documents and

resources

Section Location

Home

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How to Use this Tool (1 of 10)

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Definitions

Speed and ADT Definitions (slide 3)

Chapter 8820

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Definitions

Speed and ADT Definitions

Chapter 8820

Major Decision Definitions Step 2: Follow the Prompts through the Decision Tree

Step 1: Determine which Decision Tree to Use

Step 3: View the Corresponding Chart and Visualization






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How to Use this ToolThis Tool must be used in conjunction with Chapter 8820 in order to incorporate the definitions and footnotes.

If at any point you are unsure, need further clarifications or have project-specific questions, please call your District State Aid Engineer (DSAE) or District State Aid Assistant (DSAA).

1. Determine the type of work you are completing to identify which decision tree to use.

Rural/Suburban Undivided Roadway Projects

Urban Roadway Projects

Environmental Route Projects (Natural Preservation Routes/National Forest Highways/State Park Access Road)

Other Typical Projects (New/Replacement/Rehab Bridge or Approach roadway, Underpasses, 45- and 60-degree pull-in diagonal parking, off-road trail)

2. Follow the prompted questions through the decision tree to identify which chart to use.

3. View the corresponding rule with a chart and visualization.

Let’s do an example. Click “Next”.1-1

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https://www.dot.state.mn.us/stateaid/programlibrary/stateaidrules.pdf


http://www.dot.state.mn.us/stateaid/dsae.html



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Definitions


Chapter 8820

Step 2: Follow the Prompts through the Decision Tree








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Major Decision Definitions

Major Decision DefinitionsThe definitions listed below are limited to the major decisions on which decision tree and charts to use in this visualization tool.

Subpart. 30 Reconditioning – includes resurfacing, replacement or rehabilitation of the pavement struc-ture to extend the life of the roadway and effec-tively address critical safety and operations needs through minor improvements to the existing facility. Reconditioning projects generally utilize the existing horizontal and vertical alignment, may entail minor widening or geometric improvement, and normally require little or no additional right-of-way. Recondi-tioning may include changes in vertical or horizontal alignment involving no more than 20 percent of the length of the project. Reconditioning may include curb replacement along no more than 20 percent of the length of the project, not including curb replace-ment for purposes of meeting the Americans with Disabilities Act requirement. Work does not normally extend beyond the existing ditch bottom.

Subp. 31 Reconstruction – (1) the replacement of an existing roadway on a similar alignment or (2) the replacement of an existing bridge with a completely new bridge.

Subp. 43a Urban – a roadway that includes a curb and gutter and is, or will be in the foreseeable future, located in an area that is sufficiently developed to warrant an urban design.

Subp. 31a Rural – a roadway that includes ditches and is located in an area that is not presently, nor will it be in the foreseeable future, sufficiently developed to warrant use of an urban design.

Subp. 37 Suburban – an area both in a subdivided area or an area in a detailed development process, and where physical restraints are present that pre-vent reasonable application of the rural design stan-dards.

If at any point you are unsure, need further clarifi-cations or have project specific questions, please call your District State Aid Engineer (DSAE) or District State Aid Assistant (DSAA).

Let’s do an example. Click “Next”.1-2

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Definitions


Chapter 8820








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Step 1 – Determine which Decision Tree to Use






For this example, "Rural/Suburban Roadway Projects" was clicked on in the Main Tabs.

Click “Next” to move to Step 2.


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Definitions


Chapter 8820

Major Decision Definitions Step 1: Determine which Decision Tree to Use







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Step 2: Follow the Prompts through the Decision Tree

Step 2 – Follow the Prompts through the Decision TreeFollow the question prompts to determine which chart to use. Then click to go directly to the rule.

For this example, the highlighted path along the decision tree indicates the chart that was selected.

What is the road type?

Rural/Suburban* Undivided**

What type of work are you completing?

New/Reconstruction*

Reconditioning*

Select the rule that applies and navigate to the corresponding

chart and visualization.

8820.9920

8820.9926

*See 8820.0200 in Chapter 8820 for more Definitions**For rural divided roadways, use the geometric design standards of the MnDOT Facility Design Guide, with a minimum ten tons structural design and minimum 40 mph design speed. Click “Next” to move to Step 3.

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Definitions


Chapter 8820








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Step 3: View the Corresponding Chart and Visualization After selecting the rule in the decision tree, each rule includes:

1. Overview of the chart in the Chapter 8820.

2. Visualization example with corresponding chart notes.

8820.9920 MINIMUM DESIGN STANDARDS; RURAL AND SUBURBAN UNDIVIDED;NEW OR RECONSTRUCTION PROJECTS.

When the road authority has determined that the roadway will be specifically designed to includeon-road bicycle facilities, and only if the roadway surface is paved, the appropriate design criteriain the current MnDOT Bikeway Facility Design Manual are recommended for design toaccommodate the bicycle facility.

New or reconstruction projects for rural and suburban undivided roadways must meet or exceedthe minimum dimensions indicated in the following design chart. Where two dimensions areindicated, the larger values within the ranges are desirable.

Bridgesto

StructuralDesignStrength

Sur-facing

MinimumDesignSpeed(e)

Clear Zone(d)

In-slope(c)

ShoulderWidth

LaneWidth(b)

ProjectedADT(a) Remain

(f) WidthCurb toCurb

feettonsmphfeetrise:runfeetfeet

22Agg.3071:3111-120-4922Agg.4091:4311-1250-149

28

7-ton/10-tonStaged (h)

Agg./Paved40151:4411-12150-299

2810-tonStaged (h)Paved40151:4411-12300-749


3010Paved40301:46(g)11-121500 andover

Engineering judgment should be used to choose a lane-width, on-road bicycle facility, orshoulder-width dimension other than the widths indicated in the chart for roadways. Factors toconsider include safety, speed, population/land use, benefit/cost analysis, traffic mix, peak hourlytraffic, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic,on-street parking, intersection and driveway spacing, rights-of-way constraints, vehicle turn laneconfiguration, sight distance, sight lines, bus routes, other nonmotorized uses, functionalclassification, or other factors. Dimensions less than those indicated in the chart require a variancein accordance with parts 8820.3300 and 8820.3400.

For rural divided roadways, use the geometric design standards of the Mn/DOT Road DesignManual, with a minimum ten tons structural design and minimum 40 mph design speed.

(a) Use the existing traffic for highways not on the state-aid system.

Copyright © 2017 by the Revisor of Statutes, State of Minnesota. All Rights Reserved.

8820.9920MINNESOTA RULES1

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Click “Next” to see an overview of the chart for 8820.9920.



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Definitions


Chapter 8820








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Step 3: View the Corresponding Chart and Visualization 8820.9920 example of the chart in Chapter 8820

8820.9920 Minimum Design Standards; Rural and Suburban Undivided; New or Reconstruction Projects

When the road authority has determined that the roadway will be specifically designed to include on-road bicycle facilities, and only if the roadway surface is paved, the appropriate design criteria in the current MnDOT Bikeway Facility Design Manual are recommended for design to accommodate the bicycle facility.

New or reconstruction projects for rural and suburban undivided roadways must meet or exceed the minimum dimensions indicated in the following design chart. Where two dimensions are indicated, the larger values within the ranges are desirable.

(feet) (feet) (rise: run) (feet) (mph) (tons) (feet)

0-49 11-12 1 1:3 7 30 Agg. 22

50-149 11-12 3 1:4 9 40 Agg. 22

150-299 11-12 4 1:4 15 40 Agg./ Paved

7-ton/ 10-ton

Staged (h)

28

300-749 11-12 4 1:4 15 40 Paved 10-tonStaged (h)

28

750-1499 11-12 4 1:4 25 40 Paved 10-tonStaged (h)

28

1500 and over

11-12 6(g) 1:4 30 40 Paved 10 30

Projected ADT (a)

Lane Width

(b)

Shoulder Width

Inslope (c)

Clear Zone (d)

Minimum Design

Speed (e)

Surfacing Structural Design

Strength

Bridges to Remain (f) Width Curb to

Curb

If this is the incorrect chart and visualization, the button will return you to the corresponding decision tree.

Click “Next” to see an example of 8820.9920 visualization example with

corresponding chart notes.


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Return to Decision Tree



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Definitions


Chapter 8820








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Step 3: View the Corresponding Chart and Visualization Example of 8820.9920 visualization and corresponding chart notes

1. What is the projected ADT?

2. What is the minimum design speed?

Z Y X W V U T


Projected ADT (a)

Lane Width

(b)

Shoulder Width

In-slope

(c)

Clear Zone

(d)

Minimum Design

Speed (e)


Strength

Bridges to Remain

(f) Width Curb to

Curb


0-49 11-12 1 1:3 7 30 Agg. 2250-149 11-12 3 1:4 9 40 Agg. 22150-299 11-12 4 1:4 15 40 Agg./

Paved7-ton/ 10-ton

Staged (h)

28

300-749 11-12 4 1:4 15 40 Paved 10-ton Staged (h)

28


28

1500 and over

11-12 6(g) 1:4 30 40 Paved 10 30

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Must see Chapter 8820 to read the footnotes.

9920

Y (g)

Bridges to Remain - Width Curb to CurbT (f)

Surfacing (Aggregate or Paved)V

Clear ZoneW (d)

Clear ZoneW (d)

Structural Design Strength

Inslope X (c)

Lane WidthZ (b)

Lane WidthZ (b)

ShoulderWidthY (g)

ShoulderWidth

Inslope X (c)Agg or Paved Agg or Paved

U (h)

Visualization Not to ScaleRural and Suburban Undivided; New or Reconstruction ProjectsVisualization Not to Scale

Lowercase letters apply to the footnotes section within Chapter 8820.

Visualization not to scale

If this is the incorrect chart and visualization, the button will return you to the corresponding decision tree.


Click Next to identify how to read the chart and visualization.





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Definitions


Chapter 8820








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How to read the chart and visualizations: Highlighted yellow columns and the numbered questions signify the selection criteria, which are used to identify the design ranges, represented by in the remaining columns.



Z Y X W V U TProjected ADT (a)

Lane Width

(b)

Shoulder Width

In-slope

(c)

Clear Zone

(d)

Minimum Design

Speed (e)


Strength

Bridges to Remain

(f) Width Curb to

Curb


0-49 11-12 1 1:3 7 30 Agg. 2250-149 11-12 3 1:4 9 40 Agg. 22150-299 11-12 4 1:4 15 40 Agg./

Paved7-ton/ 10-ton

Staged (h)

28


28


28

1500 and over

11-12 6(g) 1:4 30 40 Paved 10 30

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Definitions


Chapter 8820








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8820.9920 MINIMUM DESIGN STANDARDS; RURAL AND SUBURBAN UNDIVIDED;NEW OR RECONSTRUCTION PROJECTS.

When the road authority has determined that the roadway will be specifically designed to includeon-road bicycle facilities, and only if the roadway surface is paved, the appropriate design criteriain the current MnDOT Bikeway Facility Design Manual are recommended for design toaccommodate the bicycle facility.

New or reconstruction projects for rural and suburban undivided roadways must meet or exceedthe minimum dimensions indicated in the following design chart. Where two dimensions areindicated, the larger values within the ranges are desirable.

Bridgesto

StructuralDesignStrength

Sur-facing

MinimumDesignSpeed(e)

Clear Zone(d)

In-slope(c)

ShoulderWidth

LaneWidth(b)

ProjectedADT(a) Remain

(f) WidthCurb toCurb

feettonsmphfeetrise:runfeetfeet

22Agg.3071:3111-120-4922Agg.4091:4311-1250-149

28

7-ton/10-tonStaged (h)

Agg./Paved40151:4411-12150-299



3010Paved40301:46(g)11-121500 andover

Engineering judgment should be used to choose a lane-width, on-road bicycle facility, orshoulder-width dimension other than the widths indicated in the chart for roadways. Factors toconsider include safety, speed, population/land use, benefit/cost analysis, traffic mix, peak hourlytraffic, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic,on-street parking, intersection and driveway spacing, rights-of-way constraints, vehicle turn laneconfiguration, sight distance, sight lines, bus routes, other nonmotorized uses, functionalclassification, or other factors. Dimensions less than those indicated in the chart require a variancein accordance with parts 8820.3300 and 8820.3400.

For rural divided roadways, use the geometric design standards of the Mn/DOT Road DesignManual, with a minimum ten tons structural design and minimum 40 mph design speed.

(a) Use the existing traffic for highways not on the state-aid system.


8820.9920MINNESOTA RULES1How to read the chart and visualizations: The visualization is a reminder of all locations described in the chart and footnotes, within reason. UPPER-CASE letters on the chart direct you to the proper location on the visualization, while the lowercase letters in the parentheses reference the footnotes in Chapter 8820.9920.

Z Y X W V U T

9920

Y (g)



Clear ZoneW (d)

Clear ZoneW (d)


Inslope X (c)

Lane WidthZ (b)

Lane WidthZ (b)

ShoulderWidthY (g)

ShoulderWidth


U (h)


(b) The state-aid engineer may approve lane widths of ten feet on roads classified as local orcollector if truck and bus volumes are relatively low, rights-of-way are constrained, design speedsare 35 mph or less, and ADT is less than 1,500.

(c) Applies to inslope within the clear zone only. Approach roadway sideslopes in the clearzone must be 1:4 or flatter. Mn/DOT Road Design Manual clear zone may be used.

(d) Culverts with less than 30-inch vertical height allowed without protection in the clear zone.Mn/DOT Road Design Manual clear zone widths may be used in lieu of the values in the table inthis part.

Guardrail is required to be installed at all bridges where the design speed exceeds 40 mph, andeither the existing ADT exceeds 400 or the bridge clear width is less than the sum of the lane andshoulder widths.

Mailbox supports must be in accordance with chapter 8818.

For roadways in suburban areas as defined in part 8820.0200, the clear zone may be reducedto a width of ten feet for projected ADT under 1,000 and to 20 feet for projected ADT of 1,000 orover. Wherever the legal posted speed limit is 45 mph or less, the clear zone may be reduced to awidth of ten feet.

(e) Subject to terrain. In suburban areas, the minimum design speed may be equal to the currentlegal posted speed where the legal posted speed is 30 mph or greater.

(f) Bridges to remain must have a load rating factor of at least 0.75 using the AASHTO Manualfor Bridge Evaluation, LRFR (load and resistance factor rating) for inventory level. A bridgenarrower than these widths may remain in place if the bridge is not deficient structurally orhydraulically.

(g) Shoulders are required to be a minimum width of eight feet for highways classified as minorarterials and principal arterials with greater than 1,500 ADT projected, at least two feet of whichmust be paved.

(h) Except within municipal corporate limits, ten-ton staged structural design must be able tocarry ten-ton axle loads except during spring load-restriction periods, or year-round if needed forsystem continuity. Roadbed width must accommodate ultimate ten-ton pavement overlay thicknessand ultimate 1:4 sideslope. Within municipal corporate limits, minimum structural design mustsupport nine-ton axle strength.

HL-93 loading in the AASHTO LRFD (load and resistance factor design) Specifications isrequired for new or reconstructed bridges. Rehabilitated bridges must have a load rating factor ofat least 0.9 using the AASHTO Manual for Bridge Evaluation, LRFR (load and resistance factorrating) for inventory level. The curb-to-curb minimum width for new or reconstructed bridges mustbe equal to the proposed lane plus shoulder widths, but in no case less than the minimum lanewidths plus four feet, and in no case less than required per Minnesota Statutes, section 165.04.

Statutory Authority: MS s 14.386; 14.389; 162.02; 162.09; 162.155


2MINNESOTA RULES8820.9920


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Definitions


Chapter 8820






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Step 1: Determine which Decision Tree to UseMajor Decision Definitions Step 2: Follow the Prompts

through the Decision TreeStep 3: View the Corresponding

Chart and Visualization

Let’s get StartedWhat type of work are you completing? Select the relevant Main Tab above.



ENVIRONMENTAL ROUTE ACCESS


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8820.9920 8820.9926

Rural/Suburban Roadway Projects

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Definitions


Chapter 8820






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Decision Tree – Rural/Suburban Undivided Roadway Projects


Rural/Suburban* Undivided**


New/Reconstruction*

Reconditioning*



8820.9920

2 4 51 3

2-1

8820.9926

*See 8820.0200 in Chapter 8820 for more Definitions

** For rural divided roadways, use the geometric design standards of the MnDOT Facility Design Guide, with a minimum ten tons structural design and minimum 40 mph design speed.



8820.9926


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Definitions


Chapter 8820







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8820.9920

8820.9920 Minimum Design Standards; Rural and Suburban Undivided; New or Reconstruction ProjectsWhen the road authority has determined that the roadway will be specifically designed to include on-road bicycle facilities, and only if the roadway surface is paved, the appropriate design criteria in the current MnDOT Bikeway Facility Design Manual are recommended for design to accommodate the bicycle facility.

New or reconstruction projects for rural and suburban undivided roadways must meet or exceed the minimum dimensions indicated in the following design chart. Where two dimensions are indicated, the larger values within the ranges are desirable.

Projected ADT (a)

Lane Width

(b)

Shoulder Width

Inslope (c)

Clear Zone (d)

Minimum Design Speed (e)


Strength

Bridges to Remain(f) Width Curb to

Curb


0-49 11-12 1 1:3 7 30 Agg. 22

50-149 11-12 3 1:4 9 40 Agg. 22

150-299 11-12 4 1:4 15 40 Agg./ Paved

7-ton/ 10-tonStaged (h)

28


28


28

1500 and over

11-12 6(g) 1:4 30 40 Paved 10 30

2 4 51 3

2-2

Engineering judgment should be used to choose a lane-width, on-road bicycle facility, or shoulder-width dimension other than the widths indicated in the chart for roadways. Factors to consider include safety, speed, population/land use, benefit/cost analysis, traffic mix, peak hourly traffic, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic, on-street parking, inter-section and driveway spacing, rights-of-way constraints, vehicle turn lane configuration, sight distance, sight lines, bus routes, other nonmotorized uses, functional classifica-tion, or other factors. Dimensions less than those indicated in the chart require a variance in accordance with parts 8820.3300 and 8820.3400.

Click "Next" for visualization


8820.9926


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Definitions


Chapter 8820






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8820.9920 Minimum Design Standards; Rural and Suburban Undivided; New or Reconstruction Projects (Two-way Roadway with Two Travel Lanes)



Z Y X W V U T

8820.9920

Projected ADT (a)

Lane Width

(b)

Shoulder Width

In-slope

(c)

Clear Zone

(d)

Minimum Design

Speed (e)


Strength

Bridges to

Remain(f)

Width Curb to

Curb


0-49 11-12 1 1:3 7 30 Agg. 2250-149 11-12 3 1:4 9 40 Agg. 22150-299 11-12 4 1:4 15 40 Agg./

Paved7-ton/ 10-ton

Staged (h)

28


28


28

1500 and over

11-12 6(g) 1:4 30 40 Paved 10 30

2 4 51 3

2-3


9920

Y (g)



Clear ZoneW (d)

Clear ZoneW (d)


Inslope X (c)

Lane WidthZ (b)

Lane WidthZ (b)

ShoulderWidthY (g)

ShoulderWidth


U (h)



This tool must be used in conjunction with Chapter 8820 in order to incorporate the definitions and footnotes. Return to

Decision Tree




8820.9920


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Definitions


Chapter 8820







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8820.9926

8820.9926 Minimum Design Standards: Rural and Suburban Undivided; Reconditioning Projects

Subpart 1. Minimum reconditioning standards. Reconditioning projects for rural or suburban undivided roadways must meet or exceed the minimum dimensions indicated in the following design chart. See part 8820.0200, subpart 30, for the description of activ-ities allowed.

Existing ADT Statutory or Regulatory Posted Speed

Lane Width (Paved) Combined Lane (Paved) and Shoulder Width

1-749 45 mph or less 10 feet 11 feet

1-749 50 mph or over 10 feet 12 feet

750 and over 45 mph or less 10 feet 12 feet

750 and over 50 mph and over 11 feet 14 feet

2 4 51 3

2-4

Engineering judgment should be used to choose a lane-width, on-road bicycle facility,or shoulder width dimension other than the widths indicated in the chart. Factors to consider include safety, speed, population/land use, benefit/cost analysis, traffic mix, peak hourly traffic, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic, on-street parking, inter-section and driveway spacing, rights-of-way constraints, vehicle turn lane configuration,sight distance,sight lines, bus routes, other nonmotorized uses, functional classification, or other factors. Dimensions less than those indicated in the chart require a variance in accordance with parts 8820.3300 and 8820.3400.



8820.9920


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8820.9926 Minimum Design Standards: Rural and Suburban Undivided; Reconditioning Projects (Two-way Roadway with Two Travel Lanes)

1. What is the existing ADT?

2. What is the statutory or regulatory posted speed?

Z Y

8820.9926

Existing ADT Statutory or Regulatory Posted Speed

Lane Width (Paved) Combined Lane (Paved) and Shoulder Width

1-749 45 mph or less 10 feet 11 feet

1-749 50 mph or over 10 feet 12 feet

750 and over 45 mph or less 10 feet 12 feet

750 and over 50 mph and over 11 feet 14 feet

2 4 51 3

2-5

Lane WidthZ

Lane WidthZ

ShoulderWidth

Combined Lane + Shoulder Width

Y

Combined Lane + Shoulder Width

Y

ShoulderWidth

Agg or Paved Agg or Paved

Rural and Suburban Undivided; Reconditioning Projects9926Visualization Not to Scale


This tool must be used in conjunction with Chapter 8820 in order to incorporate the definitions and footnotes.



8820.99518820.99418820.9936 8820.9946 Subpart 1 8820.9946 Subpart 2


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Chapter 8820






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Decision Tree – Urban Roadway Projects


Urban*


New/Reconstruction*

Reconditioning*

What is your design type?

No On-road Bicycle Facility

On-road Bicycle Facility

Two-Way

One-Way

Specifically designed for an On-Road Bicycle Facility



3-1

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8820.9936

8820.9941

8820.9946 Subpart 1

8820.9946 Subpart 2

8820.9951

* See 8820.0200 in Chapter 8820 for more Definitions



8820.99518820.9941 8820.9946 Subpart 1 8820.9946 Subpart 2


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8820.9936 Minimum Design Standards, Urban; New or Reconstruction Projects

8820.9936

New or reconstruction projects for urban roadways without a designated on-road bicycle facility must meet or exceed the minimum dimensions indicated in the following design chart.

Projected Traffic Volume Design Speed Lane Width (a) Curb Reaction Distance (c) Parking Lane Width (e)

mph feet feet feetADT < 10,000 30-45 (b) 10-11 1-2 (d) 7-8

50 or over 11-12 2 8-10

ADT ≥ 10,000 30-35 (b) 10-11 1-2 (d) 7-10

40-45 11-12 1-4 7-10

50 or over 11-12 2-4 Not allowed

3-2

2 4 51 3

Engineering judgment may be used to choose a lane-width dimension other than the widths indicated in the chart for roadways. Factors to consider include safety, speed, population/land use, benefit/cost analysis, traffic mix, peak hourly traffic, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic, other nonmotorized uses, functional classification, or other factors. Widths less than those indicated in the chart require a variance in accordance with parts 8820.3300 and 8820.3400.



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Chapter 8820







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8820.9936 Minimum Design Standards, Urban; New or Reconstruction Projects (Two-way Roadway with Two Travel Lanes)

8820.9936

1. What is the projected traffic volume?

2. What is the design speed?

Z Y X

PLane Width* + Curb Reaction Distance1

Z (a) (b)

ParkingLane Width

X (e)Median*

Z (a) (b)

Clear Zone*

Clearance*

Curb Reaction Distance1

Y (c) (d)

Lane Width* + Curb Reaction Distance1

Y (c) (d) Y (c) (d)

The dashed line indicates that the curb reaction distance may be different than the width of the gutter pan. 1 The width of the curb reaction distance may span the entire width of a gutter pan and/or portion of the lane width. * See additional notes for this chart in Chapter 8820 after note (e).

Y (c) (d)

Curb Reaction Distance 1 *

4’ Min

Urban; New or Reconstruction Projects (Two Travel Lanes)9936Visualization Not to Scale

Projected Traffic Volume *

Design Speed Lane Width (a) Curb Reaction Distance (c)

Parking Lane Width (e)

mph* feet feet feetADT < 10,000 30-45 (b) 10-11 1-2 (d) 7-8

50 or over 11-12 2 8-10

ADT ≥ 10,000 30-35 (b) 10-11 1-2 (d) 7-10

40-45 11-12 1-4 7-10


3-3

2 4 51 3



Z (a) (b)

ParkingLane Width

X (e)Z (a) (b)

Clear Zone*

Clearance*


Y (c) (d)

Lane Width*

Y (c) (d)




* See additional notes for this chart in Chapter 8820 after note (e)1 Curb reaction distance may be greater or less than the width of the gutter pan. The dashed line indicates the edge of the through-traffic lane





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8820.9936 Minimum Design Standards, Urban; New or Reconstruction Projects (Two-way Roadway with Four or more Travel Lanes)

8820.9936

1. What is the projected traffic volume?


Z Y X


Z (a) (b)

ParkingLane Width

X (e)Median*

Z (a) (b)

Clear Zone*

Clearance*


Y (c) (d)


Y (c) (d) Y (c) (d)


Y (c) (d)


4’ Min


Projected Traffic Volume *

Design Speed Lane Width (a) Curb Reaction Distance (c)

Parking Lane Width (e)

mph* feet feet feetADT < 10,000 30-45 (b) 10-11 1-2 (d) 7-8

50 or over 11-12 2 8-10

ADT ≥ 10,000 30-35 (b) 10-11 1-2 (d) 7-10

40-45 11-12 1-4 7-10


3-4

2 4 51 3


PParking

Lane Width

X (e)

Clear Zone*

Clearance*

Lane Width*

Z (a) (b)

Clear Zone*


Y (c) (d)

Lane Width*

Z (a) (b) Z (a) (b) Lane Width*


Z (a) (b)Y (c) (d)

The dashed line indicates that the curb reaction distance may be different than the width of the gutter pan. 1 The width of the curb reaction distance may span the entire width of a gutter pan and/or portion of the lane width.* See additional notes for this chart in Chapter 8820 after note (e).

Urban; New or Reconstruction Projects (Four or More Travel Lanes)9936Visualization Not to Scale


* See additional notes for this chart in Chapter 8820 after note (e)1 Curb reaction distance may be greater or less than the width of the gutter pan The dashed line indicates the edge of the through-traffic lane






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8820.9941 Minimum Design Standards: On-Road Bicycle Facility for Urban; New or Reconstruction Projects

8820.9941

Projected Traffic Volume

Design Speed

Lane Width

(a)

Curb Reaction

Distance (c)

Parking Lane

Width (e)

Bikeway Design Roadways with Two Travel Lanes

Bikeway Design Roadways with Four or more Travel

Lanes Urban

(mph) (feet) (feet) (feet) (ADT) (feet) (feet)ADT <2,000 25-30 10-11 (b) 1-2 (d) 7-8 <500 SL N/A

500-2,000

WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 <500 SL or BL 5 BL 5-6500-2,000

WOL 14-16 or BL 5-6

50 or over

11-12 2 8-10 BL 5-6 BL 5-6

ADT 2,000- 5,000

25-30 10-11 (b) 1-2 (d) 7-8 WOL 14-16 or BL 5-6

WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 BL 5-6 BL 5-6

50 or over

11-12 2 8-10 BL-6 BL 6

ADT 5,000- 10,000

25-30 10-11 (b) 1-2 (d) 7-8 BL 5-6 WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 BL 5-6 or PS 8

BL 5-6

50 or over

11-12 2 8-10 BL 6 or PS 8 or SUP

BL 6 or PS 8 or SUP

ADT>10,000

30-35 10-11 (b) 1-2 (d) 7-10 BL 6 or PS 8-10 or SUP

BL 6 or PS 8-10 or SUP

40-45 11-12 1-4 7-10 BL 6 or PS 8-10 or SUP


50 or over

11-12 2-4 Not allowed



3-5

2 4 51 3

The bicycle facility design standard in this part applies when the road authority has determined that the roadway will be specifically designed to include an on-road bicycle facility.

New or reconstruction projects for urban roadways must meet or exceed the dimensions indicated in the following design chart.

Engineering judgment should be used to choose a lane-width, on-road bicycle facility, or shoulder width dimension other than the widths indi-cated in the chart. Factors to consider include safety, speed, population/land use, benefit/cost analysis, traffic mix, peak hourly traffic, farm equip-ment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic, on-street parking, intersection and driveway spacing, rights-of-way constraints, vehicle turn lane configuration, sight distance, sight lines, bus routes, other nonmotorized uses, functional classification, or other fac-tors. Dimensions less than those indicated in the chart require a variance in accordance with parts 8820.3300 and 8820.3400.

(SL = shared lane; BL = bicycle lane; WOL = wide outside lane; PS = paved shoulder; SUP = shared use path)


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8820.9941 Minimum Design Standards: On-Road Bicycle Facility for Urban; New or Reconstruction Projects (Two-way Roadway with Two Travel Lanes)

8820.9941

1. What is the projected traffic volume?2. What is the design speed?

3a. Do you have two travel lanes?

3b. What is the vehicle ADT?

Projected Traffic Volume*

Design Speed*

Lane Width

(a)

Curb Reaction Distance

(c)

Parking Lane

Width (e)


Bikeway Design Roadways with Four or more Travel Lanes

Urban(mph) (feet) (feet) (feet) (ADT) (feet) (feet)

ADT <2,000 25-30 10-11 (b) 1-2 (d) 7-8 <500 SL N/A500-2,000

WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 <500 SL or BL 5 BL 5-6500-2,000

WOL 14-16 or BL 5-6

50 or over 11-12 2 8-10 BL 5-6 BL 5-6

ADT 2,000- 5,000

25-30 10-11 (b) 1-2 (d) 7-8 WOL 14-16 or BL 5-6 WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 BL 5-6 BL 5-6

50 or over 11-12 2 8-10 BL-6 BL 6

ADT 5,000- 10,000

25-30 10-11 (b) 1-2 (d) 7-8 BL 5-6 WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 BL 5-6 or PS 8 BL 5-6

50 or over 11-12 2 8-10 BL 6 or PS 8 or SUP BL 6 or PS 8 or SUP

ADT>10,000

30-35 10-11 (b) 1-2 (d) 7-10 BL 6 or PS 8-10 or SUP BL 6 or PS 8-10 or SUP

40-45 11-12 1-4 7-10 BL 6 or PS 8-10 or SUP BL 6 or PS 8-10 or SUP


BL 6 or PS 8-10 or SUP BL 6 or PS 8-10 or SUP

Z Y X W1 W2


Z (a) (b)

ParkingLane Width

X (e)Median*

Z (a) (b)

Clear Zone*

Clearance*


Y (c) (d)


Y (c) (d) Y (c) (d)


Y (c) (d)


4’ Min



P


Y (c) (d)

ParkingLane Width

X (b) (e)

BikewayDesign

W1 (b)

This space may be used for various bikeway designs. (See footnotes below chart for a list) and with or without a parking lane. The dashed line indicates that the curb reaction distance may be different than the width of the gutter pan. 1 The width of the curb reaction distance may span the entire width of a gutter pan and/or portion of the lane width. * See additional notes for this chart in Chapter 8820 after note (e).


Z (a) (b) Z (a) (b)

Lane Width*

Y (c) (d)

Clear Zone*

Clearance*



3-6

2 4 51 3

This space may be used for various on-road bikeway designs. (See footnotes below chart for a list) and with or without a parking lane.

* See additional notes for this chart in Chapter 8820 after note (e)1 Curb reaction distance may be greater or less than the width of the gutter pan The dashed line indicates the edge of the through-traffic lane





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8820.9941 Minimum Design Standards: On-Road Bicycle Facility for Urban; New or Reconstruction Projects (Two-way Roadway with Four or More Travel Lanes)

8820.9941


Z (a) (b)

ParkingLane Width

X (e)Median*

Z (a) (b)

Clear Zone*

Clearance*


Y (c) (d)


Y (c) (d) Y (c) (d)


Y (c) (d)


4’ Min


1. What is the projected traffic volume?2. What is the design speed?

3a. Do you have two travel lanes?

3b. What is the vehicle ADT?

Projected Traffic Volume*

Design Speed*

Lane Width

(a)

Curb Reaction Distance

(c)

Parking Lane

Width (e)


Bikeway Design Roadways with Four or more Travel Lanes

Urban(mph) (feet) (feet) (feet) (ADT) (feet) (feet)

ADT <2,000 25-30 10-11 (b) 1-2 (d) 7-8 <500 SL N/A500-2,000

WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 <500 SL or BL 5 BL 5-6500-2,000

WOL 14-16 or BL 5-6

50 or over 11-12 2 8-10 BL 5-6 BL 5-6

ADT 2,000- 5,000

25-30 10-11 (b) 1-2 (d) 7-8 WOL 14-16 or BL 5-6 WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 BL 5-6 BL 5-6

50 or over 11-12 2 8-10 BL-6 BL 6

ADT 5,000- 10,000

25-30 10-11 (b) 1-2 (d) 7-8 BL 5-6 WOL 14-16 or BL 5-6

35-45 10-11 (b) 1-2 (d) 7-8 BL 5-6 or PS 8 BL 5-6

50 or over 11-12 2 8-10 BL 6 or PS 8 or SUP BL 6 or PS 8 or SUP

ADT>10,000

30-35 10-11 (b) 1-2 (d) 7-10 BL 6 or PS 8-10 or SUP BL 6 or PS 8-10 or SUP

40-45 11-12 1-4 7-10 BL 6 or PS 8-10 or SUP BL 6 or PS 8-10 or SUP


BL 6 or PS 8-10 or SUP BL 6 or PS 8-10 or SUP

Z Y X W1 W2

3-7

2 4 51 3


PParking

Lane Width

X (b) (e)Lane Width*

Z (a) (b)

BikewayDesign

W2 (b)


Y (c) (d)

Lane Width*

Z (a) (b) Z (a) (b) Lane Width*


Y (c) (d)Z (a) (b)

This space may be used for various bikeway designs. (See footnotes below chart for a list) and with or without a parking lane. The dashed line indicates that the curb reaction distance may be different than the width of the gutter pan. 1 The width of the curb reaction distance may span the entire width of a gutter pan and/or portion of the lane width. * See additional notes for this chart in Chapter 8820 after note (e).

Clear Zone*

Clearance*

Urban; New or Reconstruction Projects (Four or More Travel Lanes)9941Visualization Not to Scale



* See additional notes for this chart in Chapter 8820 after note (e)1 Curb reaction distance may be greater or less than the width of the gutter pan

The dashed line indicates the edge of the through-traffic lane





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8820.9946 subpart. 1. Minimum Design Standards, Urban; Reconditioning Projects

8820.9946 Subpart 1

Number of Through Lanes and Present Traffic Volume

Total Width with No Parking

Total Width with Parking on One Side

Total Width with Parking on Both Sides

Proposed Structural Design Strength

(feet) (feet) (feet) (tons)2-Lane with ADT < 10,000 22 28 34 (b) 9

4-Lane with ADT < 10,000 44 51 58 (b) 9

2-Lane with ADT ≥ 10,000 (a)

22 28 34 9

4-Lane with ADT ≥ 10,000 44 51 58 9

6-Lane 66 (c) (c) 9

3-8

2 4 51 3

Subpart 1. Two-way streets. In the following design chart, total width is from face-to-face of curbs.

Reconditioning projects for two-way urban roadways must meet or exceed the minimum dimensions indicated in the chart.

Engineering judgment may be used to choose a lane-width or shoulder-width dimension other than the widths indicated in the chart for roadways. Factors to consider include safety, speed, population/land use, benefit/cost analysis, traffic mix, peak hourly traffic, farm equipment, environmental impacts, terrain limita-tions, bicycle traffic, pedestrian traffic, other nonmo-torized uses, functional classification, or other factors. Widths less than those indicated in the chart require a variance in accordance with parts 8820.3300 and 8820.3400.

Subp. 3. Exception. Any street that was previously built to state-aid or state standards, or that was granted a variance to standards in effect at the time of construc-tion or reconstruction, or that is a trunk highway turn-back, but does not meet current standards, may be reconditioned regardless of subparts 1 and 2.



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8820.9946 subpart. 1. Minimum Design Standards, Urban; Reconditioning Projects (Two-way Street with Two Through Lanes)

8820.9946 Subpart 1

1. What is the number of through lanes and present traffic volume?

Z Y WXNumber of Through Lanes and Present Traffic Volume


Total Width with Parking on One

Side

Total Width with Parking on Both

Sides

Proposed Structural Design

Strength(feet) (feet) (feet) (tons)

2-Lane with ADT < 10,000

22 28 34 (b) 9


44 51 58 (b) 9


22 28 34 9

4-Lane with ADT ≥ 10,000

44 51 58 9

6-Lane 66 (c) (c) 9

3-9

2 4 51 3


PP

Lane Width

(a)Lane Width

(a)

Parking Lane Width

Parking Lane Width

Total Width Parking on Both Sides

X (c)

Total Width Parking on One Side

Y (c)

Total Width No Parking

Z (c)

Proposed Structural Design StrengthW (b)

Subpart 1 (2 Lane, 2 Way)9946Visualization Not to Scale






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8820.9946 subpart. 1. Minimum Design Standards, Urban; Reconditioning Projects (Two-way Street with Four or More Through Lanes)

8820.9946 Subpart 1


Z Y WXNumber of Through Lanes and Present Traffic Volume


Total Width with Parking on One

Side


Sides

Proposed Structural Design

Strength(feet) (feet) (feet) (tons)


22 28 34 (b) 9


44 51 58 (b) 9


22 28 34 9

4-Lane with ADT ≥ 10,000

44 51 58 9

6-Lane 66 (c) (c) 9

3-10

2 4 51 3


PP

Lane Width

(a)Lane Width

(a)Lane Width

(a)Lane Width

(a)

Parking Lane Width

Parking Lane Width

Total Width Parking on Both Sides

X (c)


Y (c)


Z (c)


Subpart 1 (4 Lane)9946Visualization Not to Scale






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8820.9946 subpart. 2. Minimum Design Standards, Urban; Reconditioning Projects

8820.9946 Subpart 2


Present ADT Total Width with No Parking



Sides

Proposed Structural Design Strength

(feet) (feet) (feet) (tons)2-Lane < 5,000 21 29 37 7

5,000-10,000 23 31 39 9

10,000-15,000 23 31 39 9

≥ 15,000 24 32 40 9

3-Lane All 34 42 50 9

3-11

2 4 51 3

Subp. 2. One-way streets. In the following design chart, total width is from face-to-face of curbs.

Reconditioning projects for one-way urban roadways must meet of exceed the minimum dimensions indicated in the chart.

Subp. 3. Exception. Any street that was previously built to state-aid or state standards, or that was granted a variance to standards in effect at the time of construction or reconstruction, or that is a trunk highway turnback, but does not meet current standards, may be reconditioned regardless of subparts 1 and 2.



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8820.9946 subpart. 2. Minimum Design Standards, Urban; Reconditioning Projects (One-way Street with Two Through Lanes)

8820.9946 Subpart 2

1. What is the number of through lanes?2. What is the present ADT?

Z Y X WNumber of Through Lanes and Present Traffic Volume

Present ADT




Sides

Proposed Structural

Design Strength(feet) (feet) (feet) (tons)

2-Lane < 5,000 21 29 37 7

5,000-10,000

23 31 39 9

10,000-15,000

23 31 39 9

≥ 15,000 24 32 40 9

3-Lane All 34 42 50 9

3-12

2 4 51 3


P

Lane Width

(a)Lane Width

(a)

Parking Lane Width


Y (c)


Z (c)


Subpart 2 (2 Lane, One-Way)9946Visualization Not to Scale






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Chapter 8820







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8820.9951 Minimum Design Standards, On-Road Bicycle Facilities for Urban; Reconditioning Projects

8820.9951

The bicycle facility design in this part applies when the road authority has determined that the roadway will be specifically designed to include an on-road bicycle facility.

Reconditioning projects for urban roadways must meet or exceed the minimum dimensions indicated in the following design chart.

Engineering judgment should be used to choose a lane-width, on-road bicycle facility, or shoulder width dimension other than the widths indicated in the chart. Factors to consider include safety, speed, population/land use, benefit/cost analysis, traffic mix, peak hourly traffic, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic, on-street parking, intersection and driveway spacing, rights-of-way constraints, vehicle turn lane configuration, sight distance, sight lines, bus routes, other nonmotorized uses, functional classification, or other factors. Dimensions less than those indicated in the chart require a variance in accordance with parts 8820.3300 and 8820.3400.

(SL = shared lane; BL = bicycle lane; WOL = wide outside lane; PS = paved shoulder; SUP = shared use path)


Design Speed

Lane Width (a)

Parking Lane Width

(d)

Proposed Structural

Design Strength

Bikeway Design

(mph) (feet) (feet) (tons) (ADT) (feet)Two-Lane with ADT <10,000

25-30 10-11 (b)-(c) 7-8 9 (e) <1,000 SL

1,000-5,000 WOL 14-16 or BL 5-65,000-10,000 BL 5-6

35-45 10-11 (b)-(c) 7-8 9 (e) <500 SL or BL 5-6500-10,000 BL 5-6 or PS 8

50 or over 11-12 8-10 9 (e) <10,000 BL 5-6 or PS 8 or SUPTwo-Lane With ADT >10,000 (a)

25-30 10-11 (b)-(c) 7-10 9 >10,000 BL 5-6

35-45 10-11 (b)-(c) 7-10 9 >10,000 BL 5-6 or PS 8 or SUP50 or over 11-12 Not allowed 9 >10,000 BL 6 or PS 8-10 or SUP

Four-Lane with ADT <10,000

25-30 10-11 (b)-(c) 7-8 9 (e) <10,000 WOL 14-16 or BL 5-6

35-45 10-11 (b)-(c) 7-8 9 (e) <10,000 BL 5-650 or over 11-12 8-10 9 (e) <10,000 BL 5-6 or PS 8 or SUP

Four-Lane with ADT >10,000

30-45 10-11 (c) 7-10 9 >10,000 BL 6 or PS 8-10 or SUP

50 or over 11-12 Not allowed 9 >10,000 BL 6 or PS 8-10 or SUPSix-Lane 11-12 Not allowed 9 Not allowed SUP

3-13

2 4 51 3



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Chapter 8820







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8820.9951 Minimum Design Standards, On-Road Bicycle Facilities for Urban; Reconditioning Projects (Two-way Roadway with Two Through Lanes)

8820.9951

P

Curb

Rea

ction

D

istan

ce1 *

Park

ing

Lane

Widt

h

Y (c

) (d)

Med

ian*

Bike

way

Des

ign

This

spac

e may

be us

ed fo

r var

ious b

ikewa

y des

igns.

(See

foot

note

s belo

w ch

art f

or a

list)

and w

ith or

with

out a

park

ing la

ne.

1 The w

idth o

f the

curb

reac

tion d

istan

ce m

ay sp

an th

e ent

ire w

idth o

f a gu

tter p

an an

d/or

porti

on of

the l

ane w

idth.

* See

addit

ional

note

s for

this

char

t in C

hapt

er 8

820

after

note

(e).

Lane

Widt

h +

Curb

Re

actio

n D

istan

ce1 *

Z (a

) (b)

(c)

Z (a

) (b)

(c)

Lane

Widt

h +

Curb

Re

actio

n D

istan

ce1 *

Curb

Rea

ction

D

istan

ce1 *

4’ M

inW

(c)

2-La

ne99

51Vi

suali

zatio

n N

ot to

Sca

le



3-14

2 4 51 3


Design Speed

Lane Width (a)

Parking Lane Width

(d)

Proposed Structural

Design Strength

Bikeway Design


25-30 10-11 (b)-(c) 7-8 9 (e) <1,000 SL

1,000-5,000 WOL 14-16 or BL 5-65,000-10,000 BL 5-6



25-30 10-11 (b)-(c) 7-10 9 >10,000 BL 5-635-45 10-11 (b)-(c) 7-10 9 >10,000 BL 5-6 or PS 8 or SUP

50 or over 11-12 Not allowed 9 >10,000 BL 6 or PS 8-10 or SUPFour-Lane with ADT <10,000

25-30 10-11 (b)-(c) 7-8 9 (e) <10,000 WOL 14-16 or BL 5-635-45 10-11 (b)-(c) 7-8 9 (e) <10,000 BL 5-6

50 or over 11-12 8-10 9 (e) <10,000 BL 5-6 or PS 8 or SUPFour-Lane with ADT >10,000

30-45 10-11 (c) 7-10 9 >10,000 BL 6 or PS 8-10 or SUP50 or over 11-12 Not allowed 9 >10,000 BL 6 or PS 8-10 or SUP

Six-Lane 11-12 Not allowed 9 Not allowed SUP

Z Y X WLowercase letters apply to the footnotes section within Chapter 8820.

P

Curb Reaction Distance1 *

ParkingLane Width

Y (c) (d)

BikewayDesign

This space may be used for various bikeway designs. (See footnotes below chart for a list) and with or without a parking lane. 1 The width of the curb reaction distance may span the entire width of a gutter pan and/or portion of the lane width. * See additional notes for this chart in Chapter 8820 after note (e).

Lane Width + Curb Reaction Distance1 *

Z (a) (b) (c) Z (a) (b) (c)

Lane Width

W (c)

2-Lane9951Visualization Not to Scale

P


ParkingLane Width

Y (c) (d)

BikewayDesign



Z (a) (b) (c) Z (a) (b) (c)

Lane Width

W (c)










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Chapter 8820







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8820.9951 Minimum Design Standards, On-Road Bicycle Facilities for Urban; Reconditioning Projects (Two-way Roadway with Four Through Lanes)

8820.9951

P

Curb

Rea

ction

D

istan

ce1 *

Park

ing

Lane

Widt

h

Y (c

) (d)

Med

ian*

Bike

way

Des

ign

This

spac

e may

be us

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P

ParkingLane WidthLane Width*

Z (a) (b) (c)

BikewayDesignLane Width*

Z (a) (b) (c) Z (a) (b) (c)Lane Width*


Z (a) (b) (c)



Y (c) (d)W (c)


3-15

2 4 51 3

Z Y X WNumber of Through Lanes and Present Traffic Volume

Design Speed

Lane Width (a)

Parking Lane Width

(d)

Proposed Structural

Design Strength

Bikeway Design


25-30 10-11 (b)-(c) 7-8 9 (e) <1,000 SL

1,000-5,000 WOL 14-16 or BL 5-65,000-10,000 BL 5-6



25-30 10-11 (b)-(c) 7-10 9 >10,000 BL 5-635-45 10-11 (b)-(c) 7-10 9 >10,000 BL 5-6 or PS 8 or SUP

50 or over 11-12 Not allowed 9 >10,000 BL 6 or PS 8-10 or SUPFour-Lane with ADT <10,000

25-30 10-11 (b)-(c) 7-8 9 (e) <10,000 WOL 14-16 or BL 5-635-45 10-11 (b)-(c) 7-8 9 (e) <10,000 BL 5-6

50 or over 11-12 8-10 9 (e) <10,000 BL 5-6 or PS 8 or SUPFour-Lane with ADT >10,000

30-45 10-11 (c) 7-10 9 >10,000 BL 6 or PS 8-10 or SUP50 or over 11-12 Not allowed 9 >10,000 BL 6 or PS 8-10 or SUP

Six-Lane 11-12 Not allowed 9 Not allowed SUP


P

ParkingLane WidthLane Width*

Z (a) (b) (c)

BikewayDesignLane Width*

Z (a) (b) (c) Z (a) (b) (c)Lane Width*


Z (a) (b) (c)



Y (c) (d)W (c)










8820.99868820.9981 Subpart Type 28820.9981 Subpart Type 1 8820.9981 Subpart Type 3

Environmental Route Projects

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Decision Tree – Natural Preservation Routes/National Forest Highways/State Park Access Roads


Natural Preservation Routes/Designated

National Forest Highways within National Forests and State Park

Access Roads within National Parks


New/Reconstruction*

Reconditioning*

What is the type*?

Type I (natural surroundings convey a feeling of intimacy with nature, carries local passenger vehicles/occasional commercial)

Type II (Type I, but low volumes with seasonal peaks greater than 300 vehicles

per day - local traffic/moderate commercial vehicles)

Type III (Types I & II, but minor or major collector volumes less than 750 vehicles and

general commercial traffic)

Type I, II, III



4-1

2 4 51 3

8820.9981 Subpart Type 1



8820.9986




8820.99868820.9981 Subpart Type 2 8820.9981 Subpart Type 3


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8820.9981 Subpart Type 1 Route. Minimum Design Standards: National Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; New or Reconstruction Projects


Surface Type Minimum Design Speed

Lane Width Shoulder Width

Inslope Clear Zone Design Strength

Bridge to Remain

(mph) (feet) (feet) (rise: run) (feet) (tons) (feet)(a) (b) (c) (d)

Aggregate 30 11 1 1:3 3 22

Paved 30 11 2 1:3 9 9 22

4-2

2 4 51 3

8820.9981 Minimum Design Standards: Natural Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; New or Reconstruction Projects.

Subpart 1. Type I route. New or reconstruction projects for type I natural preservation routes, designated national forest highways within national forests, and state park access roads within state parks must meet or exceed the minimum dimensions indicated in the design chart.

Engineering judgment may be used to choose a lane-width or shoulder-width dimension other than the widths indicated in the chart for roadways. Factors to consider include safety, speed, population, land use, benefit-cost analysis, traffic mix, peak hourly traffic, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic, other nonmotorized uses, functional classification, or other factors. Widths less than those indicated in the chart require a variance under parts 8820.3300 and 8820.3400.





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8820.9981 Subpart Type 1 Route. Minimum Design Standards: National Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; New or Reconstruction Projects (Two-way Roadway with Two Travel Lanes)


1. What is the surface type?2. What is the minimum design speed?

Z Y X W V U TSurface Type

Minimum Design Speed

Lane Width

Shoulder Width


Bridge to Remain


Aggregate 30 11 1 1:3 3 22

Paved 30 11 2 1:3 9 9 22

4-3

2 4 51 3


X (a)

Bridge to RemainT (d)

Clear ZoneV (c)

Clear ZoneV (c)

Design Strength U

Lane WidthY

Lane WidthY

ShoulderWidthX (a)

ShoulderWidth

Surface Type (Aggregate or Paved)Z

Inslope W(b)

Inslope W (b)Agg or Paved Agg or Paved

(a)

National Preservation Routes; New or Reconstruction Projects9981Visualization Not to Scale








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Bridge to Remain


Aggregate 30 11 2 1:3 9 22

Paved (e) 40 11 3 1:4 9 9 22

4-4

2 4 51 3

Subp. 2. Type II route. New or reconstruction projects for type II natural preservation routes, designated national forest highways within national forests, and state park access roads within state parks must meet or exceed the minimum dimensions indicated in the design chart.






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Lane Width

Shoulder Width


Bridge to Remain


Aggregate 30 11 2 1:3 9 22

Paved (e) 40 11 3 1:4 9 9 22

4-5

2 4 51 3


X (a)


Clear ZoneV (c)

Clear ZoneV (c)

Design Strength U

Lane WidthY

Lane WidthY

ShoulderWidthX (a)

ShoulderWidth


Inslope W(b)


(a)




Decision Tree




8820.99868820.9981 Subpart Type 28820.9981 Subpart Type 1


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Bridge to Remain


Aggregate 30 11-12 3 1:4 10 24

Paved (e) 40 11-12 4 1:4 15 9 24

4-6

2 4 51 3

Subp. 3. Type III route. New or reconstruction projects for type III natural preservation routes, designated national forest highways within national forests, and state park access roads within state parks must meet or exceed the minimum dimensions indicated in the design chart.




8820.99868820.9981 Subpart Type 28820.9981 Subpart Type 1


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Lane Width

Shoulder Width


Bridge to Remain


Aggregate 30 11-12 3 1:4 10 24

Paved (e) 40 11-12 4 1:4 15 9 24

4-7

2 4 51 3


X (a)


Clear ZoneV (c)

Clear ZoneV (c)

Design Strength U

Lane WidthY

Lane WidthY

ShoulderWidthX (a)

ShoulderWidth


Inslope W(b)


(a)







8820.9981 Subpart Type 28820.9981 Subpart Type 1 8820.9981 Subpart Type 3


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8820.9986 Minimum Design Standards: Natural Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; Reconditioning Projects

8820.9986

TYPE I, II, OR III ROUTE

Proposed Design Strength Pavement Width Shoulder-to-Shoulder Width

(tons) (feet) (feet)

7 22 (a) 26 (a)

4-8

2 4 51 3

Reconditioning projects for natural preservation routes, designated national forest highways within national forests, and state park access roads within state parks must meet or exceed the minimum dimensions indicated in the design chart.

Engineering judgment may be used to choose dimensions other than those indicated in the chart for roadways. Factors to consider include safety, speed, population, land use, benefit-cost analysis, traffic mix, peak hourly traffic, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic, other nonmotorized uses, functional classification, or other factors. Dimensions less than those indicated in the chart under this part require a variance under parts 8820.3300 and 8820.3400.



8820.9981 Subpart Type 28820.9981 Subpart Type 1 8820.9981 Subpart Type 3


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8820.9986 Minimum Design Standards: Natural Preservation Routes, Designated National Forest Highways Within National Forests, and State Park Access Roads Within State Parks; Reconditioning Projects (Two-way Roadway with Two Travel Lanes)

8820.9986

TYPE I, II, OR III ROUTEZ Y X

Proposed Design Strength Pavement Width Shoulder-to-Shoulder Width

(tons) (feet) (feet)7 22 (a) 26 (a)

4-9

2 4 51 3


Pavement WidthY

ShoulderWidth

Shouder-to-Shoulder WidthX

ShoulderWidth

Proposed Design StrengthZ


National Preservation Routes; Reconditioning Projects9986Visualization Not to Scale






8820.99958820.99568820.9922 8820.9961

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Other Typical Projects

Decision Tree – Other Typical Projects


New/Replacement/Rehab Bridge or Approach roadway

Underpass

45- and 60-degree pull-in diagonal parking

Off-Road and Shared Use Path


Rural/Suburban Undivided

What is the system?

5-1

2 4 51 3

State-Aid System

Not on State-Aid System



8820.9922

8820.9956

8820.9961

8820.9995




8820.99958820.9956 8820.9961


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8820.9922 Minimum Design Standards; New Bridge, Bridge Replacement, or Bridge Rehabilitation Projects and Approach Roadways on Rural or Suburban Undivided Roadways that are Not on the State-Aid System

8820.9922

Existing ADT (a) Lane Width (b) Shoulder Width Inslope (c) Clear Zone (d) Minimum Design Speed (e)

(feet) (feet) (rise: run) (feet) (mph)

0-49 (f) 11 1 1:3 7 30

50-149 11 3 1:4 9 30

150-400 11-12(f) 4 1:4 15(g) 30

5-2

2 4 51 3

New bridge, bridge replacement, or bridge rehabilitation projects and approach roadways on rural or suburban undivided roadways that are not on the state-aid system must meet or exceed the minimum dimensions indicated in the design chart.

Engineering judgment may be used to choose a lane-width or shoulder-width dimension other than the widths indicated in the chart for roadways. Factors to consider may be safety, speed, population, land use, benefit/cost analysis, traffic mix, farm equipment, environmental impacts, terrain limitations, bicycle traffic, pedestrian traffic, other nonmotorized uses, functional classification, or other factors. Widths less than those indicated in the chart require a variance in accordance with parts 8820.3300 and 8820.3400.



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8820.9922 Minimum Design Standards; New Bridge, Bridge Replacement, or Bridge Rehabilitation Projects and Approach Roadways on Rural or Suburban Undivided Roadways that are Not on the State-Aid System (Two-way Roadway with Two Travel Lanes)

8820.9922

1. What is the existing ADT?

Z Y X W VExisting ADT (a)

Lane Width (b)

Shoulder Width

Inslope (c) Clear Zone (d) Minimum Design Speed

(e)

(feet) (feet) (rise: run) (feet) (mph)

0-49 (f) 11 1 1:3 7 30

50-149 11 3 1:4 9 30

150-400 11-12(f) 4 1:4 15(g) 30

5-3

2 4 51 3


Clear ZoneW (d) (g)

Inslope X (c)

Inslope X (c)

Lane WidthZ (b) (f)

Lane WidthZ (b) (f) Y

ShoulderWidth

Clear ZoneW (d) (g)

Y

ShoulderWidth

Appr

oach

Roa

dway

Bridg

eInslope Beyond

Clear ZoneInslope Beyond

Clear Zone

Agg o

r Pav

ed

Agg o

r Pav

ed

New \ Replacement \ Rehab Bridge or Approach Roadway9922Visualization Not to Scale



Decision Tree




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8820.9956 Minimum Vertical Clearances for Underpasses (Two-way Roadway with Two Travel Lanes)

8820.9956

1. Where is your project located?2. Is the design rural-suburban or urban?

Rural-Suburban Design, Vertical Clearance (feet-inches)

Urban Design, Vertical Clearance

(feet-inches)Highway under Roadway Bridge 16-4 14-6

Highway under Railroad Bridge 16-4 14-6

Highway under Pedestrian Bridge 17-4 15-6 (a)

Highway under Sign Structure 17-4 15-6 (a)

Railroad under Roadway Bridge (b) 22-0 22-0

5-4

2 4 51 3

Underpass projects must meet or exceed the minimum dimensions indicated in the design chart.


Urban or Rural/Suburban Design Vertical Clearance

W (e)* 1

Urban or Rural/Suburban Design Vertical Clearance

W (e)* 1

Note: all modes on the bridge are individual examples of how the bridge may be used and are not to be understood as designing one bridge for all three modes.1 Check State and Railway for additional clearance requirements.*Vertical clearance should be measured from the highest point on the roadway / rail track.

W (e)*


Underpasses9956Visualization Not to Scale







8820.99958820.99568820.9922


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8820.9961 Minimum Design Standards for 45- Degree and 60-Degree Pull-In Diagonal Parking

8820.9961

Parking Angle Present ADT Parking Stall Width Parking Stall Depth Distance Between Traffic Lane and

Parking Stall

Length Along Curb

(feet) (feet) (feet) (feet)45 degrees < 3000 9 20 2 12.7

60 degrees < 3000 9 21 7 10.4

45 degrees ≥ 3000 9 20 14 12.7

60 degrees ≥ 3000 9 21 19 10.4

5-5

2 4 51 3

Diagonal parking projects must meet or exceed the minimum dimensions indicated in the design chart.



8820.99958820.99568820.9922


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8820.9961 Minimum Design Standards for 45- Degree and 60-Degree Pull-In Diagonal Parking

8820.9961


1. What is the parking angle?2. What is the present ADT?

Z Y X W VParking Angle Present ADT Parking Stall

WidthParking Stall

DepthDistance Between

Traffic Lane and Parking

Stall

Length Along Curb

(feet) (feet) (feet) (feet)45 degrees < 3000 9 20 2 12.7

60 degrees < 3000 9 21 7 10.4

45 degrees ≥ 3000 9 20 14 12.7

60 degrees ≥ 3000 9 21 19 10.4

5-6

2 4 51 3

Distance Between Traffic Lane and Parking Stall W

Parking S

tall

WidthY

Park

ing S

tall D

epth

X

Parking AngleZ

Y

Parking AngleZ

Clearance* (2 ft min)

Clearance* (2 ft min)

45°

60°

Fixed Object

(Fixed Object)

45-Degree Example

60-Degree ExamplePa

rkin

g Sta

ll Dep

thX

Distance Between Traffic Lane and Parking Stall W

90°

90°

90°

90°

Parking Stall

Width

45- and 60-Degree Pull-In Diagonal Parking9961Visualization Not to Scale


Return to Decision TreeThis tool must be used in conjunction with Chapter 8820 in order to incorporate the definitions and footnotes.




8820.99568820.9922 8820.9961


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8820.9995 Minimum Off-Road and Shared Use Path Standards

8820.9995

For Off-Road Shared Use Path Design, the following shall apply:

Minimum Surface Width (two-way) 8 ft (a)

Shoulder/Clear Zone 2 ft (b) (c)

Inslope Maximum 1:2 (rise:run)

Design Speed 20 mph (d)

Vertical Clearance over lane and shoulder 10 ft nominal (8 ft nominal if passage of emergency or maintenance vehicles is not required) (e)

5-7

2 4 51 3



8820.99568820.9922 8820.9961


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8820.9995 Minimum Off-Road and Shared Use Path Standards

8820.9995

YZ

X

W

For Off-Road Shared Use Path Design, the following shall apply:

Minimum Surface Width (two-way) 8 ft (a)

Shoulder/Clear Zone 2 ft (b) (c)

Inslope Maximum 1:2 (rise:run)

Design Speed 20 mph (d)

Vertical Clearance over lane and shoulder 10 ft nominal (8 ft nominal if passage of emergency or maintenance vehicles is not required) (e)

5-8

2 4 51 3


Vertical Clearance Over Lane and Shoulder

Minimum Surface Width (Two-way)

Z (a) (b)

Shoulder / Clear ZoneY (b) (c)

W (e)*

Inslope X

Inslope X

*Vertical clearance should be measured from the highest point of the roadway.

Off-Road and Shared Use Path9995Visualization Not to Scale



Decision Tree




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Chapter 8820





RURAL/SUBURBAN ROADWAY PROJECTS2 4 51 3


Definitions

(1 of 1)

Speed and ADT DefinitionsThese definitions are gathered from other resources and not Chapter 8820

Statutory Speed is the value prescribed by Minnesota Statute 169.14.

Regulatory Posted Speed is the numeric value dis-played on an approved “Manual on Uniform Traffic Control Devices” (MUTCD) regulatory sign indicating the speed limit.

Design Speed is the selected speed used to deter-mine the various geometric design features of the roadway.

Existing Average Daily Traffic (ADT) is the bi-direc-tional estimate of total vehicles on a road segment on any given day. To find the existing ADT go to MnD-OT’s Traffic Forecasting and Analysis webpage or a traffic count may be conducted.

Projected ADT is the estimation of future traffic vol-umes and loads on a specific roadway segment.

If at any point you are unsure, need further clarifications or have project-specific questions, please call your District State Aid Engineer (DSAE) or District State Aid Assistant (DSAA).

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Chapter 8820





RURAL/SUBURBAN ROADWAY PROJECTS2 4 51 3

Major Decision Definitions

(1 of 1)

Major Decision DefinitionsThe definitions listed below are limited to the major decisions on which decision tree and charts to use in this visualization tool.

Subpart. 30 Reconditioning – includes resurfacing, replacement or rehabilitation of the pavement struc-ture to extend the life of the roadway and effec-tively address critical safety and operations needs through minor improvements to the existing facility. Reconditioning projects generally utilize the existing horizontal and vertical alignment, may entail minor widening or geometric improvement, and normally require little or no additional right-of-way. Recondi-tioning may include changes in vertical or horizontal alignment involving no more than 20 percent of the length of the project. Reconditioning may include curb replacement along no more than 20 percent of the length of the project, not including curb replace-ment for purposes of meeting the Americans with Disabilities Act requirement. Work does not normally extend beyond the existing ditch bottom.

Subp. 31 Reconstruction – (1) the replacement of an existing roadway on a similar alignment or (2) the replacement of an existing bridge with a completely new bridge.

Subp. 43a Urban – a roadway that includes a curb and gutter and is, or will be in the foreseeable future, located in an area that is sufficiently developed to warrant an urban design.

Subp. 31a Rural – a roadway that includes ditches and is located in an area that is not presently, nor will it be in the foreseeable future, sufficiently developed to warrant use of an urban design.

Subp. 37 Suburban – an area both in a subdivided area or an area in a detailed development process, and where physical restraints are present that pre-vent reasonable application of the rural design stan-dards.

If at any point you are unsure, need further clarifi-cations or have project specific questions, please call your District State Aid Engineer (DSAE) or District State Aid Assistant (DSAA).

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