One unified REST API covering all 50 US states and 13 Canadian provinces — 65 jurisdictions of normalized traffic data. Events, cameras, truck routes, bridge clearances, weight restrictions, analytics, and webhooks — all in GeoJSON.
Stop juggling dozens of incompatible 511 APIs. Road511 normalizes all 65 jurisdictions into a single, unified platform.
All 50 US states and 13 Canadian provinces plus national data services — 65 jurisdictions normalized into one consistent REST API. One integration covers the continent.
Incidents, construction, closures, special events, and weather advisories with severity levels, lifecycle tracking, and line/point geometry.
Cameras, rest areas, weigh stations, weather stations, EV charging, signs, road conditions, service vehicles, ferries, border crossings, truck parking, and 20+ more feature types.
Every endpoint returns standard GeoJSON. Drop responses directly into Leaflet, Mapbox, or any mapping library with zero transformation.
Filter by radius, bounding box, jurisdiction, road name, event type, or severity. PostGIS-powered spatial indexing for fast queries.
Event history timelines, clearance times (P50/P95), corridor reliability scores, and time-series trends. Turn raw data into insights.
Subscribe to event changes with HMAC-SHA256 signed payloads. Exponential backoff retries, delivery logs, and auto-disable for failing endpoints.
SHA-256 hashed API keys with per-key rate limits and usage tracking. Configurable RPM/burst with X-RateLimit headers.
Circuit breaker pattern (closed/open/half-open) with adaptive backoff. Real-time health status per data source with automatic recovery.
STAA truck routes (479k segments), NHFN freight corridors, 621k bridge clearances from NBI, seasonal weight restrictions, and truck parking across the US.
FHWA National Network, National Bridge Inventory, NREL EV charging (100k+ stations), and WZDx work zones across 24 states — all normalized alongside state 511 data.
RESTful endpoints with OpenAPI/Swagger docs. Filter by jurisdiction, type, severity, bounding box, or radius.
Two primary resource types cover all traffic data: events for time-bounded incidents and features for points of interest. Plus analytics, stats, and GeoJSON bulk export.
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [-118.243, 34.052]
},
"properties": {
"id": "ca-evt-28491",
"title": "I-405 NB lane closure",
"event_type": "construction",
"severity": "moderate",
"status": "active",
"jurisdiction": "CA",
"start_time": "2026-02-25T08:00:00Z",
"end_time": null,
"source": "cwwp2"
}
}
// ... more features
]
}
Go beyond raw data. Road511 tracks event lifecycles and delivers actionable analytics out of the box.
P50 and P95 clearance metrics by event type, severity, and jurisdiction. Know how long incidents typically take to resolve.
Time-series data showing event volumes by type, severity, and region. Spot patterns and seasonal trends across jurisdictions.
Reliability scores for major highway corridors based on historical incident frequency, duration, and severity.
Real-time feed of event lifecycle changes: created, status changes, severity updates, and archival. Never miss an update.
Full lifecycle history for every event: when it was created, each status and severity change, and when it was archived.
At-a-glance counts by jurisdiction, event type, severity, and feature type. Source health and last-sync timestamps included.
Two core resource types plus national trucking & freight data cover the full spectrum of highway information.
Start with a free 14-day trial. Upgrade to unlock more jurisdictions, bulk data, and analytics.
All 50 US states and 13 Canadian provinces — 65 jurisdictions with 60+ adapter source integrations plus national data services.
Questions about the API, custom integrations, or enterprise pricing? We'd love to hear from you.