Note: to avoid confusion, Oregon I-405 has been renamed as 905 on the list.
Data are provided for loops, stations, or loopgroups. Loops are the fundamental data source in the TRACFLOW network. Stations and loopgroups are logical groupings of individual loops, representing multi-lane conditions.
Data for volume, speed, or frequency of congestion are provided every 0.5 miles along a requested corridor.
Travel time data and summary statistics are provided for a user-defined trip route.