- AADT Annual Average Daily Traffic
- ATRI American Transportation Research Institute
- BEBR University of Florida’s Bureau of Economic and Business Research
- BEV Battery Electric Vehicles
- CRS Computerized Reservations Systems
- CTMT Combination Truck Miles Traveled
- CTTMT Combination Truck Ton Miles Traveled
- DVMT Daily Vehicle Miles Traveled
- FAF Freight Analysis Framework
- FCEV Fuel Cell Electric Vehicles
- FDOT Florida Department of Transportation
- FHWA Federal Highway Administration
- FSTED Florida Seaport Transportation and Economic Development Council
- GDP Gross Domestic Product
- HEV Hybrid Electric Vehicles
- LOS Level of Service
- MPH Miles per Hour
- MPO Metropolitan Planning Organization
- NHS National Highway System
- NHTSA National Highway Traffic Safety Administration
- NTD National Transit Database
- PHEV Plug-in Hybrid Electric Vehicles
- PMT Person Miles Traveled
- PTI Planning Time Index
- RCI Roadway Characteristics Inventory
- SHS State Highway System
- SIS Strategic Intermodal System
- TCI Traffic Characteristics Inventory
- TEU Twenty-foot Equivalent Unit
- TMT Truck Miles Traveled
- TNC Transportation Network Company
- VMT Vehicle Miles Traveled
- WIM Weigh In Motion
95th Percentile Travel Time
The travel time that is higher than 94% of travel time observations or equivalently lower than 4% of the average speed observations.
Annual Average Daily Traffic (AADT)
The average daily traffic for an entire year, 24 hours per day, 7 days a week. AADT is determined using measurements at thousands of locations each year by FDOT.
Statewide, urbanized areas of the 7 largest MPOs, other urbanized areas, and non-urbanized areas for the purpose of the FDOT Source Book.
Signalized roadways that primarily serve through traffic with average signalized intersection spacing of 2.0 miles or fewer.
A highway travel mode that includes motor vehicle traffic including motorcycles, passenger cars, and four tire, single units (FHWA Vehicle Category Classification, Classes 1- 3).
A combination of the auto and truck modes (FHWA Vehicle Category Classification Classes 1-13).
Average Weighted Speed
Calculated as the average speed weighted by the hourly vehicle miles traveled.
- Centerline Miles The total length of roads, without regard to number of lanes.
A truck tractor pulling any number of trailers (including a “bobtail” truck tractor not pulling any trailers) or a straight truck pulling at least one trailer. These are vehicles classified as Classes 8-13 by FHWA.
Condition in which traffic demand causes the LOS to be at or below FDOT’s LOS target.
Highways, rail lines, or waterways linking hub-to-corridor, hub-to-hub, or strategic military installation-to-corridor.
Highway, rail line, waterway, and other exclusive-use facilities that connect major origin/destination markets within Florida or between Florida and other states/nations.
The product of a road’s length and its AADT. If a ten-mile long road has an AADT of 5,000 vehicles, then its daily VMT is 50,000.
Added travel time for a vehicle along a given route above and beyond travel time on that route under uncongested operating conditions.
Empty Backhaul Tonnage
Amount of empty available tonnage that could have been carried by a truck while on a return trip from destination.
Roadway composed of points and segments, seaports, airports, spaceports, rail yards, or transit stations.
A system for transporting multiple people that uses one or more vehicles operating on a prescribed route according to a fixed schedule. This term does not describe fixed-route air travel, ferries, or water taxis.
Free-Flow Travel Time
The average time spent by vehicles not under the influence of speed reduction conditions over a facility length.
A multilane, divided highway with at least two lanes for exclusive use of traffic in each direction and full control of ingress and egress
Bulk goods transported by truck, train, ship, aircraft, or spacecraft.
Arterial segments operating at LOS E or worse in urbanized areas and D or worse in non-urbanized areas; highways operating at LOS E or worse; and freeways operating at 45 mph or worse
High speed roadways with signal spacing greater than two miles per signal.
The product of the centerline miles and the number of lanes. A four-lane road that is 10 miles long has 40 lane miles.
Level of Service
A quantitative stratification of the quality of service to a typical traveler of a service or facility into six letters, with “A” describing the highest quality and “F” describing the lowest quality.
Mobility Performance Measure
A metric that quantitatively describes something about the movement of people or goods.
National Highway System (NHS)
The Interstate Highway System as well as other roads important to the nation’s economy, defense, and mobility. A roadway on the NHS may not be on the SHS.
Aviation – The total number of revenue passengers boarding aircraft, which includes only passengers boarding at a Florida airport. If a passenger has to transfer between planes to reach a destination, the passenger is counted as making two passenger boardings.
Transit – The total number of passenger trips on transit vehicles. A trip is counted each time a passenger boards a transit vehicle. Thus, if a passenger has to transfer between buses to reach a destination, the passenger is counted as making two passenger trips. Seaport – The total number of passenger movements at Florida’s eight cruise ports.
Rail – The total number of revenue paying rail passengers for SunRail, Amtrak, and Tri-Rail.
Peak Hour – 5:00 p.m.-6:00 p.m. on a weekday. This hour is chosen to allow consistent comparisons among transportation modes. It may not be the hour of greatest travel for any given roadway or mode.
Peak Period – A multi-hour period (4:00 p.m.-6:00 p.m.) in which travel is greatest. These peak period hours are chosen based on the hours of greatest travel in different area types.
Daily – For the average 24-hour day.
Yearly – Includes all the calendar days in a year, excluding holidays and weekends.
Seven (7) Largest Metropolitan Planning Organizations (MPOs):
The urbanized geographic areas with a population of at least 500,000 people covered by Florida’s seven most populous MPOs: Broward MPO, Forward Pinellas, Hillsborough MPO, MetroPlan Orlando, Miami-Dade TPO, North Florida TPO, and Palm Beach TPA.
A shared-use path, also referred to as a multiuse trail, is typically 12 feet wide, but may commonly vary from 10 feet to 14 or more feet depending upon constraints or volume of use. It is differentiated from a sidewalk in that it is generally wider, is part of a larger regional and statewide systems of trails, and is accompanied by a higher level of facilities including trailheads, parking, wayside areas and other amenities.
Velocity in miles per hour. The daily average speed is the average for travel 24 hours of the day. The peak hour speed is the average speed from 5:00 p.m.-6:00 p.m.
State Highway System (SHS)
All roadways maintained and operated by the FDOT.
Strategic Intermodal System (SIS)
Florida’s transportation system composed of facilities and services of statewide and interregional significance, including appropriate components of all modes. A roadway on the SIS may not be on the SHS.
A travel mode in which vehicles (including buses, streetcars, and street-running light rail) pick up and drop off passengers at regular stops/stations.
Travel Time Reliability
On-Time Arrival – For the seven largest MPOs, on-time arrival is defined as the percentage of freeway trips traveling at least 45 mph. For all others, on-time arrival is defined as the percentage of freeway trips traveling at greater than or equal to 5 mph below the posted speed limit. For example, 80% on-time arrival indicates the traveler is anticipated to arrive at the destination on time in 4 out of 5 trips.
Planning Time Index – Planning Time Index is the ratio of 95th percentile travel time to the free-flow travel time. This measure represents the additional time that a traveler should budget to ensure on-time arrival 95 percent of the time.
Vehicles classified as Classes 4-13 by FHWA.
Twenty-Foot Equivalent Unit
The standard measure used for containerized cargo. One Twenty-Foot Equivalent Unit includes an 8-foot by 8-foot by 20-foot intermodal container.
An area with a population of at least 5,000 people.
An area with a population of at least 50,000 people.
The average number of persons in a vehicle, using a countywide average from the National Household Travel Survey conducted in 2009.
The number of vehicles crossing a section of road during a specified time period.
A vehicle made up of a narrow footboard on wheels with an upright steering handle, ridden while standing, and propelled by a combination of human power and an electric motor.
Gross Domestic Product (GDP):
The total market value of the goods and services produced within Florida or the United States in a year.
All shared-use fleets of small, fully or partially human-powered vehicles such as bikes, e-bikes and e-scooters.
Non-employer establishments for taxi and limousine services are establishments without paid employees in the Transportation and Warehousing sector that pay federal income tax.
Disabling/incapacitating injuries from traffic crashes that prevent the injured individuals from pursuing normal activities and require hospitalization.
Seven Largest Counties
Broward, Duval, Hillsborough, Miami-Dade, Palm Beach, Pinellas, and Orange.