Data is summarized from the National Performance Measures Research Dataset (NPMRDS) for all weekdays in 2018. 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 Brandon Flessner

Percent Slower Than Free Flow Speed (Weekdays | 2018)
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 (2018)
11.251.5
ReliableUnreliable
All Vehicles
Trucks (Interstates only)
Click a segment on the map to learn more.
Zoom in for more detail.