Transportation — entry 027 of 69
Road511
Road511 is a commercial aggregator that normalizes real-time 511 feeds from all 50 US states, 13 Canadian provinces, and federal sources (FHWA, WZDx, NWS, EIA fuel prices) into one REST schema covering incidents, cameras, signs, bridge clearances, and truck-corridor hazards. Access is keyed via an X-API-Key header across a tiered plan (14-day free trial through Enterprise), and a truck-routing endpoint layers hazard/clearance-aware corridor analysis on top of the raw feed.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSON, GeoJSONResponses can be requested as JSON or GeoJSON.
GreatAPIs Score
Score67
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs0/20No docs or spec available
Formats15/15Supports 2 response formats
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/road511/"><img src="https://greatapis.com/badge/road511.svg" alt="Scored 67 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.