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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Figure 3-3 Highway Reliability as Measured by the Planning Time Index: January 2013–December 2014

Thursday, September 8, 2016

Table Version | Excel

Figure 3-3 Highway Reliability as Measured by the Planning Time Index: January 2013–December 2014

NOTES: The Planning Time Index (PTI) is the ratio of travel time on the worst day of the month (the 95th percentile travel time) compared to the time required to make the same trip at free-flow speeds. A PTI of 1.60 indicates a 20-minute free-flow trip takes more than 32 minutes only one day per month. The Federal Highway Administration Urban Congestion Report (UCR) provides monthly PTI averages for 52 metropolitan statistical areas with over 1 million in population. The PTI is weighted by vehicle-miles traveled using volume estimates from the Highway Performance Monitoring System. Beginning in July 2013, data include Interstates and other freeways and expressways; prior data include Interstates only.

SOURCE: U.S. Department of Transportation, Federal Highway Administration, Office of Operations, Urban Congestion Report, available at www.ops.fhwa.dot.gov/perf_measurement as of February 2016.