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72 datasets

National Highway System

  • Published by: Caltrans
  • Last updated: Wednesday, September 30, 2026
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The National Highway System consists of a network of roads important to the economy, defense and mobility. On October 1, 2012 the existing National Hi...

High Occupancy Vehicle

  • Published by: Caltrans
  • Last updated: Wednesday, September 30, 2026
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

High-Occupancy Vehicle (HOV) lane, also known as the carpool or diamond lane, is a traffic management strategy to promote and encourage ridesharing; t...