Office of Operations Freight Management and Operations

Freight Facts and Figures 2013

Table 3-13. Performance Measurements for Selected Corridors: July-December 2012

The Federal Highway Administration (FHWA's) Freight Performance Measurement (FPM) Program monitors performance on corridors that have the heaviest freight volumes. Performance measurements for selected highway corridors are shown here. This information is beneficial in understanding freight performance on these corridors and identifying areas in need of operational and capital improvements.

Table 3-13

Table in Excel format

Corridor Average Speed  Peak Period Average Speed Non-Peak Period  Average Speed Non-Peak/Peak Ratio Buffer Index
I-5: Medford, OR to Seattle 56.24 55.05 57.25 1.04 30.10
I-5/CA 99: Sacramento to Los Angeles 55.90 55.46 56.30 1.02 25.86
I-10: Los Angeles to Tucson 59.50 58.60 60.18 1.03 19.17
I-10: Pensacola to I-75 63.87 63.90 63.85 1.00 4.74
I-10: San Antonio to New Orleans 61.54 60.60 62.34 1.03 23.20
I-30: Little Rock to Dallas 62.61 62.15 62.96 1.01 13.18
I-35: Laredo to Oklahoma City 61.41 60.25 62.25 1.03 20.09
I-40: Knoxville to Little Rock 62.25 61.98 62.48 1.01 15.50
I-40: Oklahoma City to Flagstaff 64.00 63.96 64.05 1.00 9.53
I-40: Raleigh to Asheville 62.37 62.03 62.61 1.01 9.80
I-55/I-39/I-94: St. Louis to Minneapolis 62.38 62.12 62.62 1.01 10.19
I-57/I-74: I-24 (IL) to I-55 (IL) 62.69 62.72 62.68 1.00 10.68
I-65/I-24: Chattanooga to Nashville to Chicago 61.10 60.48 61.58 1.02 20.68
I-70: Kansas City to Columbus 61.86 61.57 62.07 1.01 14.67
I-75: Lexington to Detroit 60.80 60.18 61.30 1.02 20.88
I-75: Tampa to Knoxville 62.45 61.74 62.93 1.02 13.81
I-78/I-76: New York to Pittsburgh 59.82 59.35 60.18 1.01 14.57
I-80: Chicago to I-76 (CO/NE border) 63.15 63.07 63.21 1.00 10.79
I-80: Cleveland to Chicago 62.44 62.46 62.43 1.00 10.54
I-80: New York to Cleveland 60.87 60.26 61.33 1.02 16.65
I-81: Harrisburg to I-40 (Knoxville) 62.43 62.38 62.48 1.00 10.34
I-84: Boise to I-86 62.72 62.54 62.85 1.00 6.34
I-94: Chicago to Detroit 60.47 60.12 60.77 1.01 8.39
I-95: Miami to I-26 (SC) 62.59 61.98 63.05 1.02 15.29
I-95: Richmond to New Haven 55.04 52.57 56.62 1.08 48.35

 

Notes:

For this table, reliability is expressed as a Buffer Index. The Buffer Index represents the extra buffer time (or time cushion) that most drivers add to their average travel time when planning trips to ensure on-time arrival. This extra time is added to account for any unexpected delay. The buffer index is expressed as a percentage and its value increases as reliability gets worse. This formulation of the buffer index uses a 95th percentile travel time to represent a near-worst case travel time. It represents the extra time a traveler should allow to arrive on-time for 95 percent of all trips. A simple analogy is that a driver who uses a 95 percent reliability indicator would be late only one weekday per month. The reliability measure is most meaningful when applied to an actual trip or segment. As it is applied to entire corridor in this table, the reliability calculation is applied to segments and then averaged for the corridor. The Buffer Index derived is not so much an actual percent that one would apply to determine reliability at any point on the corridor. Instead, it should be used in this case as an overall indicator of performance.

Source:

U.S. Department of Transportation, Federal Highway Administration, Office of Freight Management and Operations, Freight Performance Measurement Program, special tabulation, 2013.


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