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Transportation Data and Analytics Office

Transportation Data and Analytics / Highway Mileage Reports

Reports of Highway Mileage and Travel (DVMT)

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The highway mileage reports provide information on centerline miles, lane miles and daily vehicle miles traveled (DVMTs). The reports include a statewide summary by county and district, and detailed data on each of the three areas by highway system and functional classification. A glossary is also available.
Report Purpose, Content & Source of Data:

Content of Report - The City/County Mileage Report contains the centerline miles of roads under the jurisdiction of each city and county in Florida. This number is also broken down into paved and unpaved mileage. The report is produced in the Spring of each year, with data as of September 30 of the previous year.

Purpose of Report - This mileage data is part of a comprehensive report of mileage, traffic, pavement, and other information that we send to the Federal Highway Administration each year. The data are used to compile national data, including the need for federal highway funding. They are also used to help determine the share of the national highway funding that Florida will receive.

Source of Data - The data for each local government is supplied by that government to Florida DOT each year. They are required to do so by Chapter 218.322, Florida Statutes. They use FDOT's Form to provide the data.

Helpful Documents - A Quick Start guide on using the Form TM internet application and a frequently asked questions (FAQ) list:
QuickStart (PDF - 3 MB) FAQ (PDF - 30 KB)  
 
Blank Form TM - A blank Form TM is available in Microsoft Excel or PDF format:
Excel (Excel Doc - 48 KB) PDF (32 KB)  

Data Submissions: Cities and Counties may send FDOT their Form TM by mail, by fax, or via email:
     Mail: Florida Department of Transportation
Transportation Data and Analytics
605 Suwannee Street, Mail Station 27
Tallahassee, FL 32399
 
 
     Contacts: Eric Brickner - (850) 414-4873
Tina Hatcher - (850) 414-4706
Toll Free - (800) 399-5503
Fax - (850) 414-4878
Email - CO-Formtm@dot.state.fl.us
 

Summary reports include condensed versions of all reports since 1990:
Summary since 1991 (Excel - 390 KB)

Certification letter/report shows how the public road mileage is divided between the State Highway System, the County Road System, the City Street System, and various Federal agencies:
Certification of Public Road Mileage for the State of Florida by System 5/1/2017 (PDF - 664 KB)

Annual reports show Centerline Miles and Daily Vehicle Miles Traveled (DVMT). Subtotals by county, urban size, and functional classification are included:
FDOT reports on State Highway System Mileage have traditionally been issued as of June 30 and December 31 of each year, with the most current data available on those dates. Since annual average daily traffic (AADT) for a calendar year is not available until several months after December 31, the daily vehicle miles traveled (DVMT) calculation for both the June and the December report uses AADT from the previous calendar year in combination with the Centerline Miles as of the current date. This hybrid DVMT is therefore completely correct for neither the current nor the previous calendar year.

The new State Highway System Annual Reports are issued once a year, in the Spring after the previous year's AADT data are available. Thus the DVMT data are consistent and correct for the year being reported. We hope that data users will take advantage of the new Annual Reports, but we will continue to provide the Semi-Annual Reports for the time being, to allow for historical continuity.
 
Entire State Highway System
These reports are produced in both annual and semi-annual versions.

The annual reports (first produced in 2006) include Daily Vehicle Miles Traveled (DVMT) that are calculated from Centerline Miles (CLM) as of the end of the year of the report and Annual Average Daily Traffic (AADT) as of the same calendar year of the report. The resulting DVMT are thus calculated consistently, and the annual reports should be used whenever possible.

The semi-annual reports are done as of June 30 and December 31, and include DVMT calculated from CLM as of the date of the report and AADT as of the previous calendar year. Because of this mix of dates, the semi-annual report with DVMT that most closely matches the DVMT in the annual report is the one for June of the following year. In other words, to generate a relatively consistent time series of DVMT data from 2005 to 2008, it would be best to use the semi-annual report for June 30, 2006 (to get essentially 2005 DVMT) and then the annual reports for 2006 and thereafter.

National Highway System Only
These reports are produced in both annual and semi-annual versions.

The annual reports (first produced in 2006) include Daily Vehicle Miles Traveled (DVMT) that are calculated from Centerline Miles (CLM) as of the end of the year of the report and Annual Average Daily Traffic (AADT) as of the same calendar year of the report. The resulting DVMT are thus calculated consistently, and the annual reports should be used whenever possible.

The semi-annual reports are done as of June 30 and December 31, and include DVMT calculated from CLM as of the date of the report and AADT as of the previous calendar year. Because of this mix of dates, the semi-annual report with DVMT that most closely matches the DVMT in the annual report is the one for June of the following year. In other words, to generate a relatively consistent time series of DVMT data from 2005 to 2008, it would be best to use the semi-annual report for June 30, 2006 (to get essentially 2005 DVMT) and then the annual reports for 2006, 2007, and 2008.

Strategic Intermodal System Only
These reports are produced in both annual and semi-annual versions.

The annual reports (first produced in 2006) include Daily Vehicle Miles Traveled (DVMT) that are calculated from Centerline Miles (CLM) as of the end of the year of the report and Annual Average Daily Traffic (AADT) as of the same calendar year of the report. The resulting DVMT are thus calculated consistently, and the annual reports should be used whenever possible.

The semi-annual reports are done as of June 30 and December 31, and include DVMT calculated from CLM as of the date of the report and AADT as of the previous calendar year. Because of this mix of dates, the semi-annual report with DVMT that most closely matches the DVMT in the annual report is the one for June of the following year. In other words, to generate a relatively consistent time series of DVMT data from 2005 to 2008, it would be best to use the semi-annual report for June 30, 2006 (to get essentially 2005 DVMT) and then the annual reports for 2006, 2007, and 2008.

Florida Intrastate Highway System Only (Repealed by the 2012 Legislature)
In the 2012 Legislative Session, HB 1399 and SB 1866 repealed the definition of Florida Intrastate Highway System (FIHS) and sunset the FIHS as a separate statewide highway network to simplify the planning process. Effective July 1, 2012, the FIHS is no longer a part of the State Highway System. Instead, the Strategic Intermodal System (SIS), established in 2003, will take its place. As a result, data collection and reporting on the FIHS have ceased effective July 1, 2012. Below are historical FIHS data for reference purpose only.
 

This glossary provides definitions of terms used in the highway mileage reports:

Centerline Miles - The length of a road, in miles.
 
County Road System - Roads under the jurisdiction of one of the 67 counties of Florida. It does not include roads maintained by a county for a city under a maintenance agreement.
 
Daily Vehicle Miles Traveled (DVMT) - A measure of the total traffic on a road. It is the product of the average daily traffic count and the length of the road.
 
Florida Intrastate Highway System (FIHS) - Highway system created by the Florida Legislature in 1990 to be a statewide transportation network that provides for high-speed and high-volume traffic movements within the state.
 
Functional Classification - A description of how a road functions, using definitions and processes specified by the Federal Highway Administration. A road may be classified as a principal arterial (including Interstates, Other Freeways and Expressways, or others), a minor arterial, a collector (major or minor), or a local road. Principal arterials have a mobility function: they provide for movement from one general area to another. Local roads have an access function: they provide direct access to homes, businesses, and other destinations. The other classifications have both mobility and access functions, with minor arterials providing more mobility, and collectors providing more access.
 
Lane Miles - The product of centerline miles and number of lanes. A four-lane road, two miles long has eight lane miles.
 
National Highway System (NHS) - Roads designated by Congress as nationally important for inter-regional travel. Includes roads designated as connectors to NHS intermodal facilities.
 
Public Roads - All roads under the State Highway System, the County Road System, and the City Road System, plus public roads administered by various branches of the U.S. government. Does not include private subdivision roads or roads within shopping centers or other large private areas.
 
State Highway System - Roads under the jurisdiction of the State of Florida, and maintained by the Florida Department of Transportation or a regional transportation commission; includes roads with Interstate, US, and SR numbers.
 
Strategic Intermodal System (SIS) - Transportation system created by the Florida Legislature in 2003 to include statewide and regionally significant facilities and services, containing all forms of transportation for moving both people and goods, including linkages that provide for smooth and efficient transfers between modes and major facilities.

Florida Federal Aid Systems - Federal Aid Roads are those on the National Highway System (NHS) or functionally classified as Urban Collector / Rural Major Collector, or higher.

Florida Interchange Report (PDF, 1.18 MB) - Interchange numbers and milepost locations for Interstates and most expressways.

Florida Mobility Performance Measures Program - The MPM program is designed to develop and report on multimodal mobility performance measures.
 


For further information contact CO-TDI@dot.state.fl.us or call (850) 414-4848