FHWA HPMS
Highway Performance Monitoring System road inventory with traffic volumes.
| Publisher | Federal Highway Administration |
|---|---|
| Coverage | United States
Bounding box (EPSG:4326): -179.2, 17.8, -64.5, 71.4 |
| Licence | LicenseRef-Public-Domain
Publisher's wording: Public domain |
| Themes | us-federal-transportation, open-data-sources |
| Update cadence | Not stated |
| Formats | Not stated |
| Status | active |
| Last verified | 2026-11-05 |
| Notes | Not stated |
| Recipe | Not stated |
| Related | Not stated |
Access endpoints
| Type | URL | Layer or index | Auth | Notes |
|---|---|---|---|---|
http | https://www.fhwa.dot.gov/policyinformation/hpms.cfm | Not stated | none | Not stated |
api | https://data.transportation.gov/d/42um-tgh5 | Not stated | none | HPMS Spatial All Sections 2024 on the ARNOLD network: GeoJSON, CSV, KML exports (data.gov record, modified 2026-09-21). |
arcgis-rest | https://geo.dot.gov/server/rest/services/Hosted | Not stated | none | 2018 public release, one FeatureServer per state (Texas_2018_PR, ...). |