Scope_of_Services_Traffic_Data_Collection_2026.pdf

Part - 1 Scope of Services

I. Purpose:

Seminole County Department of Public Works, Traffic Engineering Division requires services of professional organization for the collection of traffic data throughout the

County. This data collection service is required to support and monitor the growth management activities as well as providing traffic data to support traffic studies to meet the needs of the Division on an as needed basis.

II. Project Description:

The work will consist of setting up and retrieving traffic counters, summarizing data in required format, extracting and summarizing peak hour data, conducting quality assurance review, and providing the final product in required format and quantities as specified in this scope of services.

ANNUAL SEGMENT COUNTS

1. Scope of Work

The data collected at each segment count location shall be directional and broken down into hourly and fifteen-minute totals. A single page printout in .pdf format shall be provided with 24-hour directional totals and 24-hour total volume reflected on a single page as shown on “Exhibit C.”

Data shall also be compiled in an Excel spreadsheet with Station ID, Segment Limits, Count Location, previous and current year AADT, K Factor, D Factor, Peak Period Start

Time, Peak Hour Volume, Peak Direction Volume, Peak Direction, Opposite Direction

Volume, Through Lanes and Posted Speed Limit as shown on “Exhibit D.”

2. Project Locations

Traffic data collection to be performed at various locations throughout Seminole County and the State classified road system. Specific count locations are identified by locations as noted on “Exhibit D.” A summary listing all annual count locations is enclosed with this scope of services.

3. Project Schedule

Typical data collection shall not begin before 1200 hours on Mondays and must terminate before 1200 on Fridays unless otherwise noted. Data shall not be collected on holidays of school vacation days. All data collected shall comply with standards as set forth by the Institute of Transportation Engineers “Manual of Traffic Engineering

Studies” and the F.D.O.T. “Methodology for Taking Traffic Data “report dated 1993.

4. Quantities

The annual segment counts total approximately 500 count locations and all data must be collected during the months of January through March. The total quantity is subject to change pending roadway construction and additions/subtractions as deemed necessary by the Seminole County Traffic Engineer.

5. Traffic Study Data

In addition to the annual segment counts, Seminole County will require various automatic traffic counts (speed, classification, volume, etc.), turning movement counts

(TMC’s), intersection delay studies and speed radar gun data collection. For these services, Seminole County will issue a work order specifying quantities, locations and required schedules. The cost of these services shall comply with the price proposal as specified in this contract.

A. Manual Turning Movement Counts

1 hour, 2-hour, 4 hours, and 8-hour intersection turning movements counts to be performed in accordance with the most current County and F.D.O.T.

specifications. The turning movement counts shall be summarized in 15-minute periods and hourly totals for each lane group. The submitted data shall include but not limited to an intersection diagram, north arrow, vehicle/pedestrian/large truck volumes, weather conditions, etc. A fee schedule shall be submitted for the turning movement tasks as listed here to be used for the duration of this contract.

B. Automatic Traffic Data

Volume, classification, speed, and travel time and delay studies will be required on an as needed basis. The product of these tasks shall be summarized in the same format as the Segment Counts as noted in Section A (1) of this scope of services. Types of data to be collected shall include the following items:

1. Annual 24-hour directional volume counts

2. Annual 48-hour directional volume counts

3. 24-hour directional volume counts

4. 48-hour directional volume counts

5. 7-day, 24-hour directional volume counts

6. 24-hour directional classification counts

7. 48-hour directional classification counts

8. 7-day 24-hour directional classification counts

9. 24-hour directional speed data

10. 48-hour directional speed data

11. 1 hour Turning Movement Count

12. 2 hour Turning Movement Count

13. 4 hour Turning Movement Count

14. 8 hour Turning Movement Count

15. 1-day Video Only (no data reduction)

C. Data Analysis and Summary (per hour)

The intent here is to have a man hour item for use in analyzing and/or summarizing various types of data. This data could include automatically collected data from any of our County systems, including our probe data systems (Urban SDK or ClearGuide), Bluetooth travel time system, signal performance metric (SPM) system or central signal system software (ATMS.

Now). The proposer will provide one man hour estimate for the data analyzer’s time. Prior to any work being done by this method, the County will ask for a total time estimate for the requested task. The total time will include the man hours necessary for data analysis and summary, as well as the preparation of any reports or summary files (spreadsheets, database files, web pages, etc.).

The applicants shall propose the method of data collection for the Travel Time and Delay studies.

6. Quality Assurance Review

The project manager responsible for the contracted firm providing the data shall conduct an in-depth quality assurance review to ensure validity of the data collected prior to summarization. The data shall be compared to the historical count data at the same count station from previous count periods. Count locations that vary significantly from historical data are subject to being reset without additional compensation. Some count stations may be impacted by various activities – construction, road closure, crash, etc.

and the County Traffic Engineer may elect to recount the affected location(s) as a later date. The respective firm shall be compensated for additional counts under those conditions.

7. Project Submittals

Contractor shall submit the following items upon completion of work:

A. Four (4) hard copies of the annual report summary spreadsheet with the counts totals and respective data as identified in “Exhibit D.”

B. The actual summary data spreadsheet on disk.

8. Project Management

Contractor shall identify a project manager for the duration of the project.

Telephone/FAX numbers shall be provided for normal /emergency contact. A secondary person with knowledge of all project requirements shall also be identified.