Figure 14 - Change in Travel Time Index by Metro Area Population for 75 Metro Areas: 1990-2000
Figure 14 - Change in Travel Time Index by Metro Area Population for 75 Metro Areas: 1990-2000
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NOTE: The Travel Time Index is the ratio of peak period travel time to free-flow travel time. It expresses the average amount of extra time it takes to travel during the peak period relative to free-flow travel.
SOURCE: Texas A&M University, Texas Transportation Institute, 2002 Urban Mobility Report (College Station, TX: 2002), also available at http://tti.tamu.edu/, as of May 2003.