Truck Miles Traveled

Truck vehicle miles traveled measures the amount of travel for all trucks in a geographic region over a given period of time. This measure is calculated by adding up all the miles driven by all the trucks on all the roadways in a region. This metric plays an integral role in the transportation planning, policy-making, and revenue estimation processes due to its ability to indicate travel demand and behavior.

The number of truck miles traveled each day has been steadily increasing since 2014 on Florida’s SHS. Truck miles traveled increased by 28.7% from 2014 to 2019. In 2019, there were 31.7 million daily truck miles traveled, a 2.9% increase from 2018.


Methodology: Truck Miles Traveled

Truck Miles Traveled (TMT) is computed by multiplying daily VMT by a truck factor, also known as the heavy vehicle percentage or T Factor. The truck factor for each roadway segment is provided in the RCI database.


`"TMT" = Σ ("Segment Length"×"Volume"×"% of Trucks")`

Reporting Periods

  • Peak Hour
  • Peak Period
  • Daily
  • Yearly


FDOT - Traffic Characteristics Inventory
FDOT - Roadway Characteristics Inventory