Method note ยท provenance before interpretation
About & method
What Roads & Passes is, where the data comes from, and what we do and do not claim.
What this is
Roads & Passes is a presentation layer over official state Department of Transportation road-condition feeds. It exists to answer one question on a phone before a winter drive: is my route drivable, how bad is it, and can I see it.
Where the data comes from
Road conditions and camerasstate DOT 511 feeds
Weather alertsNational Weather Service
Road-surface temperaturesDOT RWIS sensors
What we claim, and what we do not
Every reading is the DOT's own reported condition, stamped with when we retrieved it and attributed to the source, with a link to the official 511 site. We never editorialize safety and we never fabricate a reading. When a feed goes stale or dark, we say so rather than show an old number as current. We are a presentation layer, not a safety authority; for the official word, follow the DOT link on each page.
Winter storm & pass alerts
Get an email when a storm or chain restriction hits the routes you drive. Unsubscribe anytime.