Coverage before claims

Winter roads by state

A state page tells you exactly what is live here, what is missing, and where the official answer lives.

California

Caltrans CWWP2 chain-control points statewide, polled every 10 minutes.

A clear R-0 point is not a guarantee that every road segment is clear. Check the linked Caltrans route report before departure.

WSDOT Mountain Pass Conditions, including directional restrictions and agency update times.

Coverage is limited to passes WSDOT reports through the Mountain Pass API.

No live TripCheck feed is connected yet; pass pages link directly to TripCheck.

Do not treat an Oregon page here as a live chain-control answer until the TripCheck key and terms review are complete.

No live UDOT 511 key is connected yet; pages link to UDOT Traffic.

Cottonwood canyon traction status must be checked on UDOT until the feed key and signup terms are verified.

No Nevada 511 key is connected yet; pages link to Nevada 511.

Current chain or snow-tire restrictions are available only from Nevada 511 until the API key and signup terms are verified.

Public Idaho WZDx work-zone and lane-impact events, polled every 10 minutes.

The public WZDx feed is not Idaho's full mountain-pass or chain-control feed. Use Idaho 511 for winter restrictions.

COtrip road-condition segments and current CDOT snow-plow positions, polled every 10 minutes.

The normalizer surfaces Code 15/16 text when COtrip publishes it; always confirm on COtrip before travel.

No sanctioned live MDT feed is connected; pages link to Montana 511.

Automation remains blocked pending an MDT access conversation. No website data is scraped.

No WYDOT SDX feed is connected; pages link to WyoRoad.

Level 1/2 status is not republished here until WYDOT grants sanctioned feed access.

No AZ511 key is connected yet; pages link to AZ511.

Arizona generally manages severe winter travel through closures and restrictions rather than a passenger chain-control program.