(Hours per year)
|1990 delay per person||2000 delay per person||Percentage change 1990-2000||Annual growth rate 1990-2000|
|Very large areas||28||35||24||2.2|
|1990 cost per person||2000 cost per person||Percentage change 1990-2000||Annual growth rate 1990-2000|
|Very large areas||388||648||67||5.3|
Note: Very large = over 3 million population (e.g., New York-northern NJ) Large = 1 million-3 million population (e.g., Atlanta) Medium = selected areas with 500,000-1 million population (e.g., Memphis) Small = selected areas under 500,000 population (e.g., Colorado Springs) TTI estimates delay indirectly by using traffic volumes and methodology developed by the Federal Highway Administration for estimating the effects of roadway incidents. TTI estimates cost by taking into account fuel cost, value of time, and commercial vehicle operating cost.
Source: Texas Transportation Institute (TTI), 2002 Urban Mobility Report (College Station, TX: 2002), "Mobility Data" spreadsheet available at http://mobility.tamu.edu/ums/study/mobility_data, as of December 2002.