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71 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...
Adopt-A-Highway (AAH) All Other Locations
- Published by: Caltrans
- Last updated: Wednesday, September 30, 2026
- File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML
The AAH_all_other_loc feature class marks Adopt-A-Highway sites at single-postmile 'other locations' for the entire State Highway Network, merged from...
Adopt-A-Highway (AAH) All Highways
- Published by: Caltrans
- Last updated: Wednesday, September 30, 2026
- File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML
The AAH_all_Highway feature class displays Adopt-A-Highway sites as highway segments for the entire California State Highway Network, merged from all ...
Automated Weather Observation System
- Published by: Caltrans
- Last updated: Wednesday, September 30, 2026
- File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML
This layer was created from the California Aviation System Plan list of Automated Weather Observation Systems. The upgrades and distribution of Automa...
State Highway Network Postmiles
- Published by: Caltrans
- Last updated: Wednesday, September 30, 2026
- File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML
The LRSN_Postmile feature class is an Esri Roads and Highways Network (or more generically a Linear Referencing Method) that represents the California...
2024 Crash Data on State Highway System
- Published by: Caltrans
- Last updated: Tuesday, October 6, 2026
- File types: CSV
The Crash Data On California State Highways Report is produced annually by the California Department of Transportation (Caltrans) to provide high leve...
2023 Crash Data on State Highway System
- Published by: Caltrans
- Last updated: Tuesday, October 6, 2026
- File types: CSV
The Crash Data On California State Highways Report is produced annually by the California Department of Transportation (Caltrans) to provide high leve...
2022 Crash Data on State Highway System
- Published by: Caltrans
- Last updated: Tuesday, October 6, 2026
- File types: CSV
The Crash Data On California State Highways Report is produced annually by the California Department of Transportation (Caltrans) to provide high leve...
2024 Named Freeways, Highways, Structures and Other Appurtenances in California
- Published by: Caltrans
- Last updated: Tuesday, October 6, 2026
- File types: CSV
Named Freeways, Highways, Structures and Other Appurtenances in California Publication Named Freeways, Highways, Structures and Other Appurtenances in...
2023 Named Freeways, Highways, Structures and Other Appurtenances in California
- Published by: Caltrans
- Last updated: Tuesday, October 6, 2026
- File types: CSV
Named Freeways, Highways, Structures and Other Appurtenances in California Publication Named Freeways, Highways, Structures and Other Appurtenances in...