engineering design services for safety improvements along
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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
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: david.cooke@dot.state.fl.us
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
Phone Number: 407-264-3416 Fax Number: 407-822-5821
E-mail Address: rebecca.bolan@dot.state.fl.us
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
Phone Number: 407-264-3043 Fax Number: 407-822-6663
E-mail Address: Pamela.Nagot@dot.state.fl.us
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.
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