Know where our safety evidence is strongest.

Explore the sources behind height, weight, and grade guidance across the United States and Canada.

Current catalog: 28,534 clearance records across the U.S. and Canada.

Coverage describes available evidence, not every road.

Coverage by jurisdiction

Select a layer, then choose any state, province, or territory.

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Additional regional sources Broad baseline sources Fewer regional sources

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Click a region for details. Use +/− to zoom and drag to move the map.

Boundary shapes: U.S. Census Bureau 2025 Cartographic Boundary Files and Statistics Canada 2021 Census Boundary Files. Coastlines are simplified for web display.

Browse every jurisdiction

What the colors mean

Additional regional sources: ClearRoute has an eligible public-agency source or official calibration evidence in addition to the broad baseline. It still does not mean every road is documented.
Broad baseline sources: National or continental datasets, terrain evidence, and open-map sources provide broad coverage, with normal gaps and source-age limitations.
Fewer regional sources: Broad baseline data still supports routing here, but fewer eligible state, provincial, or territorial sources are available. A lack of hazard markers does not guarantee safe travel. Unlisted clearances or roadway changes are always possible. Vehicle operators must always use caution and remain vigilant for hazards.

How we decide

Start with what ships.We audit the datasets and routing evidence actually used by ClearRoute.
Keep provenance attached.Authority, reuse rights, dates, field meaning, and known exclusions all matter.
Grade conservatively.A source can improve a region without making the whole region complete.
Show the holes.Unlicensed, stale, route-specific, and unknown evidence stays visible as a limitation.

Sources behind this layer

The source register updates with the selected layer.

Other route-safety sources

These dated catalogs support hazards outside the three map layers.

Washington State Department of Transportation Highway Alerts Washington road-event information is provided by WSDOT. WSDOT traveler information policy ↗
No-RV road catalog Catalog built Aug 1, 2026. Curated legal and class restrictions cover identified corridors, not every prohibited road.
Propane tunnel operator rules Individual operator rules checked Jul 7–Aug 1, 2026. Every supported tunnel record retains its operator source; rules differ by tunnel and tank configuration.
OpenStreetMap routing graph Each deployed graph is built from a recorded OSM snapshot. Community tags can be absent, stale, or incorrect, so missing tags never prove unrestricted travel.

See something wrong or missing?

Use the safety-data feedback form in ClearRoute to keep reports tied to a route or hazard. You can also email support with the posted value, location, and an optional photo.

Report a safety-data problem

Always obey posted signs and verify conditions in person.

ClearRoute is an assistive planning tool. Public datasets, community map data, terrain models, and agency publications can be incomplete, delayed, or wrong.