This page provides plots of vehicle length or "freight" data. A primary purpose of collection and using vehicle length data is to distinguish freight vehicle traffic from non-freight vehicle traffic.
Data availability note: There have been periodic outages of the vehicle length data feed in Fall 2017. In particular, there was an extended outage from Sep 30 - Oct 27.
Two plots are available on this page. The Standard view shows what percent of traffic at a location is freight versus non-freight. The Aggregate view shows how has freight traffic at a location changed over time.