wydot signing manual · 3 the nearest sign edge and a minimum 6 foot clearance from face of curb to...

WYDOT SIGNING MANUAL

Traffic Program Operations & Design

2016

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Table of Contents Page Introduction ………………………………………………………………………………………. 1 Sign Colors ………………………………………………………………………………………... 1 Sign Placement and Mounting Height ………………………………………………………….. 2 Lateral Clearance ………………………………………………………………………...... 2 Interstate ……………………………………………………………………………………… 2 Vertical Clearance …………………………………………………………………………. 2 Primary Signs Are …………………………………………………………………………. 2 Primary Sign Lateral Clearance …………………………………………………………… 2 Secondary Signs Are ………………………………………………………………………. 3 Secondary Sign Lateral Clearance ………………………………………………………… 3 Longitudinal Spacing ……………………………………………………………………… 3 Non-Interstate ………………………………………………………………………………... 3 Vertical Clearance ………………………………………………………………………… 3 Primary Signs Are ………………………………………………………………………..... 3 Primary Sign Lateral Clearance …………………………………………………………… 3 Secondary Signs Are ………………………………………………………………………. 4 Secondary Sign Lateral Clearance ………………………………………………………… 4 Longitudinal Spacing ……………………………………………………………………… 4 Clear Zone and Breakaway Posts ……………………………………………………………….. 4 Clear Zone (Sign Structures) ………………………………………………………………... 4 Clear Zone Distances (Sign Structures) …………………………………………………….. 4 Sign Materials and Attachments ………………………………………………………………… 4 Sign Sheeting ………………………………………………………………………………….. 4 ¾ Inch Plywood ………………………………………………………………………………. 5 0.100 Aluminum ……………………………………………………………………………… 5 0.080 Aluminum ……………………………………………………………………………… 5 0.040 Aluminum ……………………………………………………………………………… 5 Pop Rivets …………………………………………………………………………………….. 5 Elevator Bolts ………………………………………………………………………………… 5 Signs Larger Than Standard Size ………………………………………………………………. 7 Regulatory Signs …………………………………………………………………………………. 7 Stop and Yield Signs …………………………………………………………………………. 7 Speed Limit Signs ……………………………………………………………………………. 8 Lane Control Signs …………………………………………………………………………... 8 Other Regulatory Signs ……………………………………………………………………… 8 Warning Signs ……………………………………………………………………………………. 9 Stop, Yield, or Signal Ahead Signs ………………………………………………………….. 9 Reduced Speed Ahead Sign …………………………………………………………………. 10 Clearance Signs for Bridges and Other Overhead Objects ………………………………. 10 Curve Signs (Horizontal Alignment) ……………………………………………………….. 10 Narrow Bridge Sign ………………………………………………………………………….. 11

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Page Brake Check Sign ……………………………………………………………………………. 11 Guide Signs ……………………………………………………………………………………….. 13 Route Markers ……………………………………………………………………………….. 13 Advance County Road Signing ……………………………………………………………… 13 Control City Signing …………………………………………………………………………. 16 Far Side Directional Signing ………………………………………………………………… 16 Arrows on Overhead Signing ……………………………………………………………….. 19 Sequence of Signs …………………………………………………………………………….. 19 District Sign Upgrades …………………………………………………………………………… 19

List of Figures Typical Installation (Lateral and vertical distances for signs and posts) ………………………… 6 Regulatory Sign Figures …………………………………………………………………………. 8 Warning Sign Figures ……………………………………………………………………………. 11 Route Marker Figures …………………………………………………………………………… 13 Signing for Interstate Diamond Interchange with Two Lane Crossroad ……………………. 14 Signing for Interstate Diamond Interchange with Multilane Crossroad …………………….. 15 Minor Interchange Crossroad Signing …………………………………………………………. 16 Junction Signing ………………………………………………………………………………….. 17 Interchange Off Ramp County/Local Cross Road Signing …………………………………… 18 Interchange Off Ramp Non-NHS Cross Road Signing ………………………………………... 18 Interchange Off Ramp NHS Cross Road Signing ……………………………………………… 19 Rectangular Timber 1 & 2 Post Selection Inside Clear Zone …………………………………. 21 Rectangular Timber 1, 2 & 3 Post Selection Outside Clear Zone ……………………………… 22 Timber Post Breakaway Details ………………………………………………………………… 23 Perforated Square Tubular Steel Post Selection Chart (50 MPH) ..………………………….. 25 Perforated Square Tubular Steel Post Selection Chart (60 MPH) …………………………… 26 Perforated Square Tubular Steel Post Selection Chart (70 MPH) …………………………… 27 Perforated Square Tubular Steel Post Details …………………………………………………. 28 Round Tubular Steel Post Selection Chart (60 MPH) ………………………………………… 29 Round Tubular Steel Post Selection Chart (70 MPH) ………………………………………… 30 Round Tubular Steel Post Selection Chart (80 MPH) ………………………………………… 31 Round Tubular Steel Post Selection Chart (90 MPH) ………………………………………… 32 Round Tubular Steel Post Details 1 of 2 ……………………………………………………….. 33 Round Tubular Steel Post Details 2 of 2 ……………………………………………………….. 34 Multi-Directional I-Beam Steel Post Details 1 of 5 …………………………………………….. 38 Multi-Directional I-Beam Steel Post Details 2 of 5 …………………………………………….. 39 Multi-Directional I-Beam Steel Post Details 3 of 5 …………………………………………….. 40 Multi-Directional I-Beam Steel Post Details 4 of 5 …………………………………………….. 41 Multi-Directional I-Beam Steel Post Details 5 of 5 …………………………………………….. 42

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List of Tables Page Minimum Distance from Warning Sign to STOP, YIELD, or Signal ……………………….. 10 Ball Bank and Curve Signs ……………………………………………………………………… 10 Chevron Spacing on Horizontal Curves ……………………………………………………….. 11 Post Length Behind Signs ……………………………………………………………………….. 24 Perforated Square Tubular Steel Post Member Size ………………………………………….. 24 I-Beam Steel Post Selection X=10 Feet …………………………………………………………. 35 I-Beam Steel Post Selection X=12 Feet …………………………………………………………. 36 I-Beam Steel Post Selection X=14 Feet …………………………………………………………. 37

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Introduction

The following signing practices are to serve as a guide for WYDOT, apply to all State (not necessarily county, city, or private) roadways and are to help set statewide standardization and consistency.

This manual and the Traffic Program shall be the final authority for sign placement in the use of regulating, warning, and guiding traffic on the State highway system. Highway right-of-way (R/W) refers to R/W on the State system – not county, city, or private.

The following are rules for WYDOT signing: • No traffic sign nor its support shall bear any commercial advertising – the exceptions are logo

and trailblazer signing within Specific Service Signing. • Any sign placed in the R/W without WYDOT authority shall be deemed a nuisance and shall be

removed. • Non-essential signing shall be removed as it degrades the value of necessary signing. • Unless approved by WYDOT, all signing within the R/W shall be erected by Department

personnel. • Any change in traffic control devices shall require prior approval of the District Traffic Engineer. • Any major change in traffic control devices shall require prior approval of the HQ Traffic

Program.

Sign Colors Red: The color is used as the background for STOP signs, ALL WAY plaques, DO NOT ENTER signs, WRONG WAY signs, and INTERSTATE route markers. It is used as the legend color for YIELD signs, PARKING prohibition signs, and the circle and diagonal bar prohibition symbol. Black: The color is used as a legend on white (regulatory), yellow (warning), orange (work zone), and fluorescent yellow-green (school pedestrian) signs. White: The color is used as the background for regulatory signs (except STOP) and route markers. It is used as the legend for brown, green, blue, black, and red signs. Orange: The color is used as the background for work zone signs. Yellow: The color is used as the background for warning signs except where orange is specified in a work zone, as the background color for pedestrian signs, and as an advisory plaque under STOP signs such as CROSS TRAFFIC DOES NOT STOP. Also used for Brake Check Areas instead of blue. Fluorescent yellow may be used in place of yellow to add emphasis or bring more attention to a sign. Fluorescent Yellow-Green: The color is used exclusively as the background for school zone signs. Brown: The color is used as a background for guide and informational signs related to named points of recreational, cultural, and historical interest.

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Green: The color is used as a background for guide signs (other than brown and orange), streams, mountain passes with elevation, and mileposts. It is also the legend color for permissive parking signs. Blue: The color is used as a background for service information signs such as 511, rest areas, logo signing, parking areas, and general POINT OF INTEREST signs. Fluorescent Pink: This color is used as a background for major traffic incidents that may close all or part of a roadway for more than 2 hours. Purple: This color is used as a background for lanes restricted to vehicles with electronic toll collection accounts.

Sign Placement and Mounting Height Lateral Clearance: Lateral clearance is measured either from the nearest edge of the travel way or from the delineators to the near vertical edge of sign panel.

The minimum lateral clearance for rural highways is 12 feet from edge of travel way. Auxiliary lanes are not considered travel way.

Minimum 5 feet from back of box beam guardrail and 2 feet from back of w-beam guardrail to near edge of sign panel.

Minimum 10 feet from cable barrier to the near sign post where practical. The minimum distance from guardrail and cable barrier applies to all roads.

Interstate

Vertical Clearance: Vertical clearance is measured from nearest edge of travel way to the bottom of the sign or lowest hanging appurtenance.

All interstate highway signs shall have a minimum vertical clearance of 7 feet (5 feet on fill slope outside of clear zone) to the bottom of the sign measured from the nearest edge of travel way. Maintain a minimum of 7 feet from ground level to the bottom of a supplemental sign.

Ramp signs shall have a minimum 5 foot vertical clearance except for hinged breakaway steel support signs which shall be a minimum of 7 feet.

Vertical clearance for all new overhead signs shall be a minimum of 19 feet. Primary Signs Are: 1. Advance guide signs, exit direction, hospital, and junction signs. 2. All regulatory signs such as port of entry, wrong way, speed limit, traffic alert, etc. 3. All warning signs such as curve, exit, advisory speed, etc. Primary Sign Lateral Clearance: Mainline - 30 feet from edge of travel way or 18 feet from delineator with 8 foot shoulder (16 feet with 10 foot shoulder) to near edge of sign panel. Ramps and crossroads – 10 feet from delineators to near edge of sign panel. With curb and gutter present, a minimum 2 foot clearance from the face of curb to

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the nearest sign edge and a minimum 6 foot clearance from face of curb to the nearest sign post (non-breakaway). Secondary Signs Are: 1. Recreational and cultural (brown background) signs – state parks, museums, historical, etc. 2. All motorist service (blue background) signs – logo, gas, food, 511, rest area, etc. 3. Supplemental guide signs – mileage, route markers, community colleges, etc. 4. State line Entering Wyoming signs. Secondary Sign Lateral Clearance: 50 feet from edge of travel way or 38 feet from delineator with 8 foot shoulder to near vertical edge of sign panel. Longitudinal Spacing: Spacing between signs on mainline interstate should be a minimum 750 feet. Longitudinal sign spacing on ramps is recommended at 250 feet but can be a minimum of 100 feet.

Non-Interstate Vertical Clearance:

• All signs on rural roadways shall have a 5 foot minimum vertical clearance (7 feet for steel breakaway with hinges) except for non-interstate median divided road sections which shall have a 7 foot minimum clearance (5 feet on fill slope outside of clear zone).

• All signs on urban road sections or on road sections with curb and gutter and/or sidewalk shall have a minimum 7 foot vertical clearance.

• By request, vertical clearance can be increased to 7 or more feet in high snow areas. • Vertical clearance for all new overhead signs shall be a minimum of 19 feet except for

designated corridors. Primary Signs Are: 1. Primary guide signs such as advance guide signs (includes passing lane/truck climbing lane sign), exit direction, hospital, and junction signs. 2. All regulatory signs such as port of entry, wrong way, speed limit, traffic alert, etc. 3. All warning signs such as curve, exit advisory speed, etc. Primary Sign Lateral Clearance:

• Over 45 mph, the minimum lateral clearance is 15 feet from delineator to near vertical edge of sign panel; for 45 mph and under, 10 feet from delineator to near vertical edge of sign panel.

• The minimum lateral clearance on rural highways is 12 feet from edge of travel way to near edge of sign panel.

• In curb and gutter sections at 45 mph and under, lateral clearance is 2 feet from face of curb to near edge of sign and 4 feet from face of curb to the near sign post (non-breakaway). Over 45 mph will be decided on a case by case basis.

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Secondary Signs Are: 1. Recreational and cultural (brown background) signs – state parks, museums, historical, etc. 2. All motorist service (blue background) signs – logo, gas, food, 511, rest area, etc. 3. Supplemental guide signs – mileage, route markers, community colleges, etc. 4. State line Entering Wyoming signs. Secondary Sign Lateral Clearance: 25 feet from delineator to near vertical edge of sign panel. Longitudinal Spacing: Spacing between signs on rural non-interstate should be a minimum of 500 feet with 750 feet preferred.

Clear Zone and Breakaway Posts Clear Zone (Sign Structures) The clear zone is the lateral distance, measured from the edge of travel way to the near vertical sign edge, in which the sign posts shall be of a breakaway design. Outside of the clear zone, use non-breakaway post designs and do not drill wood posts. Clear Zone Distances (Sign Structures)

• Interstate clear zone is 50 feet. • Roadways with no curb and gutter and speed limits of 50 mph and above shall have a clear zone

of 30 feet. • The clear zone for interstate ramps and roads with no curb and gutter and speed limits of 45 mph

or less is 20 feet. • The minimum lateral sign structure placement on a roadway without curb and gutter is 12 feet

from the edge of travel way or if the shoulder is wider than 6 feet, 6 feet from the break over edge of shoulder.

• Roadways with curb and gutter and speeds of 45 mph or less require no breakaway design and the minimum distance from the face of curb to the near sign post shall be 4 feet but no less than 2 feet to the near edge of sign.

• For multiple post sign structures within the clear zone where the posts have not been certified for simultaneous impact, ensure a 7 foot clear distance between the inside edge of all posts.

Sign Materials and Attachments Sign Sheeting:

• Ground mount signs shall be Type IV background with Type IV or EC film opaque characters. • Ground mount green and white guide signs fabricated by contractors shall be Type IX legend on

Type IV background. • Overhead guide signs shall be Type IX legend with Type IV background. Urban overhead guide

signing shall have external lighting on the structure if an unlit sign is ineffective.

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• Brown EC film shall be used on the backs of signs within the forest service boundaries on all rural non-interstate roads.

3/4 Inch Plywood: Normally used for Sign Shop fabricated signs 8’ x 4’ or larger. Used in 66” or wider and 60” x 54” contractor fabricated signs. It is also used on overhead signs in high wind areas. 0.100 Aluminum: Normally used for overhead signs when plywood is not used. 0.080, 0.125 Aluminum: 0.080 is normally used for Sign Shop fabricated signs 8’ x 4’ or smaller. Contractor fabricated signs 60” wide or narrower use aluminum. 0.125 is used for special request only. 0.040 Aluminum: Normally used for sign overlays to reface existing signs. Pop Rivets: 3/16 inch rivets with aluminum mandrels should be used for attaching 0.040 aluminum overlays to existing signs. Rivets shall be spaced at 6 inch centers around the edge of each overlay panel and 12 inch centers throughout the remaining portion of the overlay panel. Pop Rivets: 1/4 inch rivets with steel mandrels should be used for attaching backing angles to aluminum signs. Elevator Bolts: 1/4 inch x 1½ inch bolts used to attach plywood to backing angles. Elevator bolt heads shall be covered with the appropriate reflective sheeting.

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Signs Larger Than Standard Size The following conditions should be considered for larger than standard size signs:

1. Sight restrictions. 2. Sign visibility or conspicuity. 3. Crash experience. 4. Complaints or near misses.

The following situations are where signs are the maximum standard size:

1. Stop and Stop Ahead signs at junctions or interstate off ramps. 2. Contractor project construction sites (WYDOT roadway work operations will use 36 inch

construction signs). Consideration should be given to the following prior to increasing sign size:

1. Addition of another sign such as Stop Ahead. 2. Doubling the sign(s) – one on each side of the road

Example: Speed Limit, Stop, Stop Ahead, Curve Signs. 3. Addition of a flashing beacon to the sign. 4. In the case of a warning sign, using fluorescent yellow sheeting to draw attention to the sign. 5. Addition of flags on existing signs.

Regulatory Signs Regulatory signs are used to inform road users of selected traffic laws or regulations and shall be installed at or near where the regulations apply. The signs shall clearly indicate the regulation requirements and shall provide adequate visibility and legibility to obtain compliance. Regulatory sign colors are black and white, red and white, or a black/red/white combination. Stop and Yield Signs

• STOP and YIELD signs shall be placed as near as practical to the point where the vehicle is to stop or yield.

• Lateral placement should be 6 feet to 12 feet from edge of pavement or minimum 2 feet from face of curb.

• If the STOP sign must be moved further than 12 feet from the crossroad to achieve the aforementioned lateral placement, a stop bar should be placed where vehicles are to stop.

• STOP signs can be no further than 50 feet from the crossroad. • STOP sign sizes shall be 48 inches for the intersection of two State roads and all interchange exit

ramps. • Use 30 inch STOP signs for all other situations unless deemed otherwise by unique design

parameters. • Use 36 inch YIELD signs. • STOP or YIELD signs are not mandated by State law at intersections of State roadways with

private roads or driveways or with alleys, driveways, or buildings within a business or residential district (Wyoming Statutes 31-5-223 and 31-5-506).

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Speed Limit Signs • SPEED LIMIT sign sizes are used as follows: 48” X 60” on all interstates and where greater

emphasis is needed on other State roadways; 36” X 48” on all non-interstate and urban roadways; 24” X 30” only in urban areas where space will not allow a larger size.

• All roads two miles or more in length shall have (a) speed limit sign(s). • When routes require a speed advisory plaque below the curve warning sign, the speed limit sign

should be moved away from the curve to avoid conflicting with the advisory speed. • Speed limit signs should not be used to lower speeds approaching intersections. • Local jurisdiction signing allowed on State roads for SPEED LIMIT UNLESS OTHERWISE

POSTED shall be place prior to the posted speed limit using minimum longitudinal spacing. Lane Control Signs

• At a signalized multi-lane intersection, use advance ground mount signing designating lane usage.

• Use overhead signing on the mast arms at the intersections with restricted lane use. An example is a through lane becoming a left turn only lane.

• Three or more through lanes on an approach require that if overhead lane designation signing is used, it shall be placed over the designated lane.

Other Regulatory Signs

• ONE WAY, DO NOT PASS, PASS WITH CARE, Parking Regulation Signs, Handicapped Parking, DO NOT ENTER, CHAIN LAW, Weight Limit Signs, Port of Entry Signs, etc.

• For all applications, WYDOT default sizes for ONE WAY signs shall be 36” X 12” for the R6-1 and 18” X 24” for the R6-2. Use a 54” X 18” arrow in roundabouts.

• Consider using TURNING VEHICLES YIELD TO PEDESTRIANS for high volume pedestrian areas.

Regulatory Sign Figures

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Warning Signs Warning signs are used to warn traffic of existing or potentially hazardous conditions on or adjacent to the roadway. Unless otherwise noted, place warning signs 750 feet prior to the stated warning. An example is a curve warning sign placed 750 feet prior to the point of curvature (pc) in a curve. Stop, Yield, or Signal Ahead Signs

• Use STOP AHEAD or YIELD AHEAD signs on all rural State highways and exit ramps approaching a STOP or YIELD sign.

• If 12 feet lateral placement is exceeded, from either the traveled road or the crossroad, and the sign is difficult to see, a STOP or YIELD AHEAD sign shall be installed and a stop or yield bar is recommended.

• Use the same size STOP AHEAD sign as the STOP sign. • Use 30 inch YIELD AHEAD signs. • Place the STOP AHEAD and YIELD AHEAD signs 750 feet prior to the STOP or YIELD signs. • Use a SIGNAL AHEAD sign when transitioning from higher speed rural and approaching the

first signal in lower speed urban or when approaching a signal (or series of signals) in high speed (greater than 45 mph) areas.

• Place the SIGNAL AHEAD sign 750 feet prior to the signal. When sight distance is insufficient to respond to a STOP/YIELD sign or a signal and 750 feet is unobtainable to set the above warning signs, use the following table as a minimum distance to set the warning signs prior to the STOP, YIELD, or signal. Use 500 feet minimum for 60+ mph.

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Minimum Distance from Warning Ahead Sign to STOP, YIELD, or Signal

Speed Limit (MPH) Distance (Feet) 20 100

25 100 30 100 35 100 40 125 45 175 50 250 55 325 60 400

Reduced Speed Ahead Sign Use a REDUCED SPEED AHEAD sign when transitioning from high speed rural to a lower speed urban and the reduction is greater than 10 mph. If the speed reduction is 20 mph or less, place the REDUCED SPEED AHEAD sign 750 feet before the speed limit sign. If the speed reduction is greater than 20 mph, place the REDUCED SPEED AHEAD sign 1000 feet to 1500 feet before the speed limit sign. Clearance Signs for Bridges and Other Overhead Objects Use bridge clearance signs for structures or overhead objects with 19 feet of clearance or less over the roadway. On interstates, place a 48 inch bridge clearance height sign 250 feet past the exit gore. Use a median clearance sign when a bridge is 16 feet or lower in height and place across from the advance exit speed sign. Use best fit on crossroad. Curve Signs (Horizontal Alignment) The following table illustrates curve signing using a ball bank indicator when driving through the curve with a speed limit of 70 MPH. With a speed limit of 70 MPH, the 60 MPH advisory is required. With a 65 MPH speed limit, the first line would be ’63 or more’. Use a 10 foot lateral placement with a 5 foot mounting height from edge of travel way for the chevrons.

Ball Bank Speedometer Signing (Degrees) Reading 10 68 or more None, unless hidden curve

10 63 – 67 Curve Sign-65 MPH optional w/ 70 SL 10 58 – 62 Curve Sign–60 MPH optional w/ 65 SL 10 53 – 57 Curve Sign w/ 55 MPH and Chevrons and/or Large Arrow* 10 48 – 52 Curve Sign w/ 50 MPH and

Chevrons and/or Large Arrow* 10 43 – 47 Curve Sign w/ 45 MPH and

Chevrons and/or Large Arrow 10 38 – 42 Curve Sign w/ 40 MPH and Chevrons and/or Large Arrow 10 33 – 37 Curve Sign w/ 35 MPH and

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Chevrons and/or Large Arrow 12 28 – 32 Turn Sign w/ 30 MPH and





Chevrons and/or Large Arrow *Use chevrons/large arrow when advisory speed is 15 mph or more under the posted speed limit. On clover leaf exit ramps or curves with 270o of curvature, use the Loop Curve Sign in place of the Turn Sign. If the curve is greater than 135o but not a loop, use the Hairpin Curve Sign. Use the Turn Sign in place of the Curve Sign for curve advisories of 30 MPH or less.

Chevron Spacing on Horizontal Curves

Advisory Speed Chevron Spacing 15 mph or less 40 feet 20 to 30 mph 80 feet 35 to 45 mph 120 feet 50 to 60 mph 160 feet

More than 60 mph 200 feet Narrow Bridge Sign Use this sign in advance of bridges with less than a 24 foot clear roadway width. Emphasis may be added with the use of object markers, delineators, pavement markings, and/or NO PASSING regulatory signs. Brake Check Signs All BRAKE CHECK signs that are involved with vehicle and/or truck pullouts shall be black on yellow. Fluorescent yellow may be used to add emphasis.

Warning Sign Figures

Winding Road Curve Turn Hairpin Loop

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Object Marker Figures

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Guide Signs Guide signs are essential in directing the road user to destinations along established routes. These signs inform, identify, guide, and directionally aid the traveler by using the simplest and most practical signing practices. Route Markers

Route Marker Figures

Use route markers on crossroads to designate interstate and cardinal direction for any and all ramps. When used as lone signs, auxiliaries such as cardinal directions or arrows shall match the color combination of the respective marker. In a cluster with all routes heading in the same direction, default to the color combination of the highest order marker in the cluster - interstate/U.S/ State. Advance County Road Signing Consider installing advance signing for a County road if fifty or more residences are accessed by the road or if a left turn lane exists on the State road to access the County road.

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Signing for Interstate Diamond Interchange with Two Lane Crossroad

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Signing for Interstate Diamond Interchange with Multilane Crossroad

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Minor Interchange Crossroad Signing

For the three previous figures, if a near side sign placement (before ramp) is not practical or possible, use a far side placement. Control City Signing Guide signing on an NHS crossroad at an interchange shall use the nearest control cities as the destinations. Non-NHS cross road interchange guide signing shall use the nearest towns as the destinations. Interstate distance signing shall use the nearest town and the nearest control city. Far Side Directional Signing Far side directional signing is used at junctions, tee intersections, and interstate off ramps.

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Junction Signing

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Interchange Off Ramp County/Local Cross Road Signing

Interchange Off Ramp Non-NHS Cross Road Signing

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Interchange Off Ramp NHS Cross Road Signing

Arrows on Overhead Signing On overhead guide signs, an up or down arrow shall be positioned over the center of the lane and underneath the legend. An exception is replacing a sign on a structure with a larger sign that would require a new structure. If the structure will not be replaced, duplicate the old sign. Sequence of Signs Leaving town on the interstate, the sequence of signs from the last interchange shall be route markers, speed limit, distance, EMEGENCY PARKING ONLY, and 511 signing. Leaving town on non-interstate, the sequence of signs shall be route markers, speed limit, distance, and 511 signing. The repetitive distance between the sign sequence is twenty miles plus or minus.

District Sign Upgrades Every District shall inspect one third of its signs each year for sign upgrading. A Traffic rep from the District and one from Cheyenne Traffic shall perform the inspection. The Cheyenne rep for non-interstate will be from Signing while the Cheyenne rep for interstate will be from the Sign Shop. Cheyenne and the districts shall set up a sign upgrade schedule to be followed each year. Night time sign inspections will be performed by the District before the general inspection. Once the inspection is

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completed, signs that need to be overlaid or replaced will have the layouts done in Cheyenne. The signs will be fabricated by the Sign Shop and installed by the District or by contract.

Note: For two 6 * For requi ** 4”x4” s

6”x6” or 6” x 8

ired drilled hol

surfaced timber

8” posts, the cl

ld sizes, see pa

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age 23.

rilled holes. 4”

21

etween inside f

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faces of posts m

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6”x6” or 6” x 8

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22

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POST LENGTH BEHIND SIGNS

SIGN POST SIGN POST HEIGHT LENGTH LENGTH

1'-0" 1' 24" Interstate Shield 2' 1'-6" 1' 36" Interstate Shield 3' 2'-0" 2' 24" US Shield 2' 2'-6" 2' 24" County Road Shield 2' 3'-0" 3' 24" Forest Service Shield 2' 3'-6" 3' 30" Diamond 3' 4'-0" 3' 36" Diamond 4' 4'-6" 4' 48" Diamond 5' 5'-0" 4' 30" Octagon 2' 5'-6" 5' 48" Octagon 3' 6'-0" 5' 36" Yield 2' 7'-0" 6' 48" Yield 3' 8'-0" 7' 30" School 2' 9'-0" 7' 36" School 3'

10'-0" 9' 48" School 3' 11'-0" 9' 48" x 36" No Passing Zone 3' 12'-0" 10' 36" Circle 2'

Chart is used to estimate post length. Top of post should be 1 inch above top angle iron.

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PERFORATED SQUARE TUBULAR STEEL POST BREAK-AWAY ROADSIDE SIGN POST

SELECTION CHART

WIND EXPOSURE - OPEN URBAN AREAS (60 M.P.H.)

1 - 21µ• X 2'.t.• 12 Ga. Post

E 3 1---+---+---µ.,--+-- --+--~ :...... OJ 'ii> I

§, 2 t----+-- ~,!__-+-- -1----1----:+;.i~---l----l ci5 II

I 1 i---1---4---+-- ----"------1-- --1---'--~

0 1 2 3 4 5 6 7

W = Sign Width (Fl)

NOTE::

For open urban areas with fewer obstructions. Wind pressure on signs approximately equal to that from a 60 MPH wind velocity in open terrain.

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30

ROUND TUBULAR STEEL POST BREAK-AWAY ROADSIDE SIGN POST

SELECTION CHART

WIND EXPOSURE (70 M.P.H.)

7 ,---,-------.-----,---,_------------,

[s~-~-~-~-~~~-~-~ l: 0) "ii) I 4 1---+------1--~e;,;i.-:r.-, - ~ ---+---I----!--~ C ~~

Cl <n II 3 b---r---+--r----,t---+--+----'1---- -+-----+- ~

I

1 2 3 4 5 6 7 8 9

W = Sign Width (FT)

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ROUND TUBULAR STEEL POST BREAK-AWAY ROADSIDE SIGN POST

SELECTION CHART

W IND EXPOSURE (90 M .P.H .)

7 ,------.-----.---..-------------

6 i----i----i---r---4'.

1 2 3 4 5 6 7 8 9

W = Sign W idth (FT)

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I-BEAM X=10 Feet

I-beam steel X is equal to the mounting height plus the x distance labeled in the TYPICAL INSTALLATION figure on page 6.

36

I-BEAM X=12 Feet


37

I-BEAM X=14 Feet


I-Beam Mul

3

lti- Direction

38

nal Breakaw

way Details 1

I-Bea

am Multi- D

39

Directional BBreakaway Details 2

I-Beam Mul

4

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nal Breakawway Details 3

I-Bea

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41

Directional BBreakaway Details 4

I-Beam Mul

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nal Breakaw

way Details 5

wydot signing manual · 3 the nearest sign edge and a minimum 6 foot clearance from face of curb to...

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