% Travel Heavily Congested

This measure is determined by summing the Vehicle Miles Traveled (VMT) on roadways under heavily congested conditions and then dividing by the total system VMT.

The percentage of travel heavily congested decreased in 2019, changing the growth trend between 2015 and 2018. In 2019, it decreased marginally by 0.2 percentage points from 2018 during the peak hour on Florida’s SHS.


Methodology: % Travel Heavily Congested

The percent of travel heavily congested was determined by summing the vehicle miles traveled on roadways operating at defined LOS thresholds and then dividing it by the total system vehicle miles traveled.


`(Σ ("VMT during Peak Performance at defined LOS thresholds"))/(Σ " VMT") ×100`

Reporting Periods

  • Peak Hour
  • Peak Period
  • Daily
  • Yearly


FDOT - Traffic Characteristics Inventory
FDOT - Roadway Characteristics Inventory
HERE Technologies - Travel Time Data