engineering design services for safety improvements along

Engineering Design Services for Safety Improvements along CR 476 from the Hernando County Line to US 301 (SR 35)Sumter County, FloridaNovember 7, 2014

SUBMITTED BY:

Dewberry | Bowyer-Singleton 520 South Magnolia AvenueOrlando, Florida 32801321.354.9626

SUBMITTED TO:

Sumter County Board of County CommissionersOffi ce of Management & Budget7375 Powell Road, Suite 200 Wildwood, Florida 34785352.689.4435

www.dewberry.com

Section 1: Qualifi cations

Safety Improvements along CR 476 | Sumter County | 1

Qualifications Dewberry | Bowyer-Singleton

UNDERSTANDING OF PROJECT CR 476 from the Hernando County Line to US 301 (SR 35)

in Sumter County is an existing two lane rural roadway

approximately 9.0 miles in length. The adjacent

development is mostly residential, and there are numerous

residential side street connections to CR 476. The roadway

alignment includes five horizontal curves, and one grade

crossing where CR 476 crosses over I-75. There is one

signalized intersection at US 301. Drainage from the roadway

is accommodated by roadside ditches. Existing pavement

markings along this route are thermoplastic. The project will

include removing the existing centerline and outer edge line

pavement markings and replacing them with wet weather

audible pavement markings through the entire project limits.

The posted speed limit along the project is 45 mph. No

additional right-of-way is required.

EXPERIENCE & STAFFING Dewberry | Bowyer-Singleton has extensive experience in

roadway design and construction plans preparation. Projects

have ranged from intersection improvements and milling

and resurfacing of existing roadways to new limited access

facilities and multi-level systems interchanges. We have

provided design services to the Florida Department of

Transportation (FDOT) since 1985 and have served Sumter

County in various capacities since 2008.

Our staff is well qualified for any type of roadway design

project, including safety related improvements to existing

facilities. Our proposed staffing for this project includes the

following key staff assignments:

Project Manager, Don

Hammack, PE - Don

Hammack, Associate Vice

President and Senior

Project Manager at

Dewberry | Bowyer-

Singleton, has over 28

years of design and

management experience including alternatives development,

preliminary and final designs, preparation of construction

documents, construction inspection and field engineer

assignments. He has a strong background in project

management and design, having been involved in projects

ranging from minor improvements to complex highway

interchanges.

Roadway/ Traffic

Engineer, Jim

Bradford, PE – Jim

Bradford, Traffic Engineer

at Dewberry | Bowyer-

Singleton, has over 10

years of experience in a

wide variety of traffic

engineering and roadway engineering projects throughout the

state of Florida. His areas of expertise include field traffic

studies, traffic and transportation engineering, and Intelligent

Transportation Systems (ITS). He is proficient in MicroStation,

Guidesign, FDOT Multi-Post Sign Support software, and

Microsoft Office Professional Suite.

Principal-in-Charge,

Rey Malavé, PE – Rey

Malave, Senior Associate,

has over 35 years

experience in civil

engineering design, and a

diversified background in

the design and permitting

of infrastructure systems

as well as working for governmental agencies and developers.

He has been involved with our Sumter County Continuing

Services Contract since 2008 and is very familiar with the

County’s preferences and procedures.

ABILITY TO MEET SCHEDULE Considering the timing of our current projects and pursuits,

we have ample resources to commit to this project. Our

projected staff commitments for the upcoming year in the

Transportation group are approximately 2,500 MH/month.

Our Transportation group has the capability of producing

3,300 MH/month, leaving 800 MH/month available for

additional assignments, well in excess of the requirements

for this project. In addition, with our minimized plan

production approach (see below) we have the ability to

efficiently produce the design and plans on an expedited

schedule if desirable.

Safety Improvements along CR 476 | Sumter County | 2

PROJECT APPROACH The primary goal of this CR 476 project is to improve safety

along the corridor through the use of wet weather audible

pavement markings. In order to gain an understanding of

potential safety issues we reviewed the crash data for the

years 2006 through 2010. The number of crashes within the

project limits ranged from a high of 17 (2006) to a low of 10

(2010). The crash locations were distributed along the

corridor and there was no concentration of crashes which

would indicate a potential issue at a specific location. The

crashes also included a number of different types of events,

from rear end collisions with other vehicles to collisions with

fixed objects and even animals. We also noted that there

were 17 crashes with incapacitating injuries and 4 fatalities

during this five-year span.

Considering that the crash locations and types of events

vary along the corridor, and the severity of a number of

crashes, we would recommend that the County include a

roadway safety audit through the limits of the project, if one

has not already been performed. This activity would occur

during the initial field review and would identify and

document roadside conditions that do not conform to

current roadside safety standards.

The roadway safety audit will be performed by one of

our Sr. Highway Engineers, and will evaluate roadside

slopes, hazards within the clear zone that may require

shielding, drop off conditions within the clear zone such as

box culvert end walls, sight distance around curves and at

intersections, and pedestrian and bicycle facilities where

these may exist. The road safety audit will include an

inventory of existing roadside signs and recommendations

for replacement or additions based on current standards.

The findings of the roadway safety audit will be

summarized in a report format. Dewberry | Bowyer-

Singleton will provide recommendations to correct

deficiencies identified in the report, and meet with the

County to discuss the findings and recommendations.

Since the existing pavement markings are thermoplastic,

they will have to be removed prior to installing the audible

markings. Removal of thermoplastic markings normally

involves water blasting or some other mechanical method. It

will be important to designate removal requirements in the

plans so the resulting pavement surface is able to accept the

new markings. We anticipate replacing the reflective paving

markings as these are normally damaged during the striping

removal. Existing passing zones will be maintained unless

the County feels that a Passing Zone Study is warranted to

re-define these areas. A review of the crash data did not

indicate that head on collisions are common and the current

passing zones may be reasonable.

Dewberry | Bowyer-Singleton proposes an efficient

approach to the development of plans for the audible

pavement markings. We recommend the locations and

quantities of the audible pavement markings be provided

only in summary tables and thereby reduce efforts by

eliminating foot by foot plan sheets. Project Layout sheet(s)

detailing project stationing and side street names will enable

cross referencing of location information shown in summary

tables with their locations along the project corridor.

The plan set will include the following sheets:

1. Key Sheet

2. Signature Sheet

3. Typical Section Sheet

4. General Notes

5. Project Layout Sheet

6. Maintenance of Traffic

7. Summary of Quantities Sheet

a. Summary Table for Audible Pavement

Markings

8. Detail Sheet for Pavement Markings

a. Typical Side Street Intersections

b. I-75 Grade Separation

c. US 301 Intersection

Pavement marking design will be provided in

accordance with the latest edition of the Manual of Uniform

Traffic Control Devices (MUTCD) and FDOT Design

Standards.

Geotechnical engineering and survey services will not be

required for the pavement marking design. Permitting will

not be required as the minor roadway safety improvements

proposed are exempt from Environmental Resource

Permitting with Southwest Florida Water Management

District per Section 62-346.051, Item 14.(c) 3., Florida

Statues.

Sumter County Board of County Commissioners – Sumter County Engineering Design Services for Safety Improvements along CR 476 from the Hernando County Line to US 301 SR 35 in Sumter County

REFERENCE & SIMILAR PROJECTS EXPERIENCE FORM

Owner / Business Name: Florida Department of Transportation, District Five

Project Location / Address: 719 South Woodland Boulevard

City: DeLand State: Florida Zip Code: 32720

Point of Contact: David Cooke, PE Dates of Work: 2009

Phone Number: 386-943-5000 Fax Number: 386-736-5153

E-mail Address: [email protected]

Project Name: SR 44, from US 301 to the Sumter/Lake County Line, Sumter County, Florida

Brief Description of Project: The SR 44 project, from US 301 to the Sumter/Lake County line, in Sumter County consisted of milling and resurfacing, and construction of 5.5 miles of rural roadway. The project included safety improvements to the existing two-lane roadway and new construction of a parallel two-lane roadway. The existing roadway was reviewed for compliance with Florida Department of Transportation’s 3R criteria. Roadway elements were brought up to current criteria, where feasible, such as reconstruction of existing vertical curves to provide adequate sight distance, and overbuilding existing horizontal curves to correct superelevation rates.

Dewberry | Bowyer-Singleton’s services included Design Surveys, Drainage Design, Environmental Permits, Right-of-Way Maps, Roadway Design, Signalization, Signing & Marking Plans, Structural Design (soundwall), and Traffic Control Plans. Dewberry | Bowyer-Singleton staff assigned to this project included Kevin Knudsen, PE, Principal-in-Charge / Project Manager, and Dan Christie, PE, Senior Roadway Engineer.

Owner / Business Name: Florida Department of Transportation, Florida’s Turnpike Enterprise

Project Location / Address: Turkey Lake Service Plaza, Mile Post 263, Building 5315

City: Ocoee State: Florida Zip Code: 34761

Point of Contact: Becky Bolan, PE Dates of Work: 2010 - 2012



Project Name: Suncoast Milling and Resurfacing

Brief Description of Project: The Suncoast Parkway project consisted of milling and resurfacing the northbound and southbound lanes of the Suncoast Parkway in Pasco County, from approximately MP 17.4 to MP 37.3, including median openings, shoulders, and ramps at SR 54, SR 52, and CR 578, as well as the Anclote and Spring Hill Mainline Toll Plazas.

The project involved design criteria, safety and maintenance upgrades in addition to the milling and resurfacing. Criteria upgrades included cross slope corrections and reconstruction of call box pads to meet ADA requirements. Safety improvements included addition of median cable barrier system and guardrail to protect hazards in clear zone. Maintenance items included erosion protection and re-grading of ditches.

Our services included Existing Roadway Conditions Report, Roadway Design, Surveying & Mapping, Drainage Design, Milling & Resurfacing, Signing & Paving Markings, Traffic Control Plans, Utility Coordination and Final Construction Plans.

Sumter County Board of County Commissioners – Sumter County Engineering Design Services for Safety Improvements along CR 476 from the Hernando County Line to US 301 SR 35 in Sumter County

Owner / Business Name: Florida Department of Transportation, Florida’s Turnpike Enterprise

Project Location / Address: Turkey Lake Service Plaza, Mile Post 263, Building 5315

City: Ocoee State: Florida Zip Code: 34761

Point of Contact: Pam Nagot, PE Dates of Work: 2013 - 2014



Project Name: Resurfacing Seminole Expressway from US 17/92 to Interstate 2, Seminole County, Florida

Brief Description of Project: This project consisted of milling, resurfacing, and roadside improvements for the Seminole Expressway Northbound and Southbound from US 17-92 to I-4 (approximately MP 49.8 to MP 55.0) including interchange ramps at US 17-92, CR 46A, and Rinehart Road. The work included milling and resurfacing existing travel lanes, inside and outside shoulders, and all paved UTurns Northbound and Southbound from south of the US 17-92 interchange at the pavement change at MP 49.8 to the bridges over Towne Center Boulevard (MP 55.0).

Improvements included constructing ground-in rumble strips and correcting shoulder drop-off along the edge of pavement, repairing of all guardrail openings for maintenance access and correcting/adjusting guardrail as a result of milling and resurfacing operations.

This document must be completed and returned with your Submittal

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Section 2: Required Forms

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