You are here
Travel Time Index
The Travel Time Index is the ratio of the travel time during the peak period to the time required to make the same trip at free-flow speeds. A value of 1.3, for example, indicates a 20-minute free-flow trip requires 26 minutes during the peak period.
Methodology and data sources have been changed in 2019; these figures are not comparable to those in past editions of NTS. Population group is based on 2017 population.
KEY: NA = not applicable; R = revised.
Very large urban areas – 3 million and over population.
Large urban areas – 1 million to less than 3 million population.
Medium urban areas – 500,000 to less than 1 million population.
Small urban areas – less than 500,000 population.
a Rank is based on the calculated percent change with the highest number corresponding to a rank of 1.
b Averages weighted by Vehicle Miles Traveled.
Texas Transportation Institute, 2019 Urban Mobility Report, (College Station, TX: 2019), available at http://mobility.tamu.edu as of Oct. 1, 2019.