Road511 — Unified North American Traffic Data API
One API. 57 Jurisdictions. Every Road Data Type. Road511 aggregates and normalizes data from 57 US state and Canadian province 511 systems into a single REST API. Instead of integrating 30+ different formats, authentication methods, and update schedules, make one API call and get standardized data across North America. What Data Is Available Traffic Events — Real-time incidents, construction,…
2 subscribers
8.7/10 popularity
1098 ms avg latency
100% success rate
26 endpoints
The in-depth APIMemo review for this API hasn't been published yet —
the data below comes straight from the public marketplace listing.
Road511 — Unified North American Traffic Data API endpoints
| Method | Endpoint | Description |
|---|---|---|
| events | ||
| GET |
listEvents /events |
Paginated list of traffic events with filters. BASIC tier requires `jurisdiction` parameter. Supports bounding box, radius search, and filtering by type/severity/status/road. |
| GET |
getEvent /events/{id} |
|
| GET |
getEventsGeoJSON /events/geojson |
Returns events as a GeoJSON FeatureCollection. **PRO+ tiers only.** |
| features | ||
| GET |
listFeatures /features |
Paginated features filtered by type. BASIC tier requires `jurisdiction` parameter. **Available types:** cameras, signs, rest_areas, weigh_stations, weather_stations, ev_charging,… |
| GET |
getFeaturesGeoJSON /features/geojson |
Returns features as a GeoJSON FeatureCollection. **PRO+ tiers only.** |
| GET |
getFeatureTypes /features/types |
Returns all feature types with total and active counts per jurisdiction |
| GET |
getFeatureDetails /features/{id}/details |
Fetches detailed properties for a feature on demand (camera image URL, sign message, weather readings, etc.) |
| truck | ||
| GET |
getTruckCorridorGeoJSON /truck/corridor/geojson |
Same as /truck/corridor but returns GeoJSON FeatureCollection. **ULTRA+ tiers only.** |
| GET |
getTruckCorridor /truck/corridor |
Returns all truck-related restrictions within a buffer around the straight-line path between two points. Uses PostGIS spatial intersection. Searches: `bridge_clearances`,… |
| analytics | ||
| GET |
getClearanceTimes /analytics/clearance |
Event clearance times (P50/P95) aggregated by jurisdiction, type, severity. **ULTRA+ tiers only.** |
| GET |
getCorridorReliability /analytics/corridors |
Top corridors ranked by event frequency and average severity. **ULTRA+ tiers only.** |
| GET |
getEventTrends /analytics/trends |
Time-series event creation counts grouped by hour/day/week, optionally by type or severity. **ULTRA+ tiers only.** |
| GET |
getWeatherCorrelation /analytics/weather-correlation |
Aggregated weather conditions across events, grouped by precipitation type and road surface. Shows how weather correlates with incident frequency and severity. **ULTRA+ tiers… |
| GET |
getEventWeather /analytics/event-weather/{id} |
Weather conditions near an event at the time it was created. Captures nearest weather station data (temperature, wind, visibility, precipitation, road surface, humidity) via… |
| GET |
getRecentChanges /analytics/changes |
Latest event lifecycle changes across all jurisdictions. **ULTRA+ tiers only.** |
| GET |
getSourceHealth /analytics/source-health |
Per-source fetch success/failure rates and performance. **ULTRA+ tiers only.** |
| GET |
getWeatherReadings /analytics/weather |
Historical weather station time-series data. **ULTRA+ tiers only.** |
| GET |
getFetchLog /analytics/fetch-log |
Fetch operation statistics and performance data. **ULTRA+ tiers only.** |
| GET |
getFeatureHistory /analytics/feature-history |
Track feature changes (created, deactivated, reactivated, schedule changes). **ULTRA+ tiers only.** |
| GET |
getHotspots /analytics/hotspots |
Geographic clusters of events ranked by density. **ULTRA+ tiers only.** |
| GET |
getEventHistory /analytics/history/{id} |
Full lifecycle history for a specific event (created, severity changes, lane updates, archived). **ULTRA+ tiers only.** |
| metadata | ||
| GET |
getStats /stats |
Event and feature counts |
| GET |
getHealth /health |
Returns server health, version, uptime, and source counts |
| GET |
getJurisdictions /jurisdictions |
Returns all active jurisdictions (US states, Canadian provinces) with country codes |
| GET |
getStatsSummary /stats/summary |
Breakdowns by jurisdiction, event type, severity, feature type, and last sync times |
| GET |
getPlans /plans |
|
Road511 — Unified North American Traffic Data API pricing
| Plan | Price | Rate limit | Quotas |
|---|---|---|---|
| BASIC | Free | 20 / second |
|
| PRO | $29 / month | 60 / second |
|
| ULTRA | $99 / month | 1000 / second |
|
| MEGA | $499 / month | 3000 / second |
|
