Data is summarized from the National Performance Measures Research Dataset (NPMRDS) for all weekdays in 2021. Data provided courtesy of FHWA and summarized by OKI.

More information on how congestion and reliability metrics are calculated is available here and here.

Questions or comments? Email Brett Porter

Percent Slower Than Free Flow Speed (Weekdays | 2021)
0%-20%-40%
Morning Rush Hour (6 - 9 AM)
Evening Rush Hour (4 - 7 PM)
Midday (9 AM - 4 PM)
Overnight (7 PM - 6 AM)
Weekday (All Day)
Level of Travel Time Reliability (2021)
11.251.5
ReliableUnreliable
All Vehicles
Trucks (Interstates only)
Person Hours of Excessive Delay (Weekday Peak Periods 2021)
010k30k50k70k
Travel Time Index
11.251.5
Less Travel TimeMore Travel Time
AM Peak
PM Peak
All Hours
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