A clear forecast does not mean an open road

Three questions, three different sources

A route check should answer three separate questions: what weather is forecast when you arrive, what the road authority currently permits, and what has actually been observed on the pavement. A forecast can help with the first question. It cannot quietly stand in for the other two.

Start with the time you reach the difficult section

If the summit is two hours into your trip, the departure-city forecast is not the relevant forecast. Review the summit checkpoint at its estimated arrival time. Then test a later departure using the same route, stop allowance and vehicle profile. Our checkpoint times are planning estimates, so leave room for a slower drive.

Confirm restrictions with the road authority

A closure can persist after a storm moves on. A chain restriction can apply to some vehicles and not others. Open the official DOT or 511 service for every state on your route and read the direction, location and vehicle conditions. A missing report in an aggregator is not an official all-clear.

Use observations for context, not permission

A camera may show only one direction or a small section of road. A clear-looking picture does not rule out ice elsewhere, and its image can be older than the surrounding webpage. Check the camera location, direction and timestamp.

A practical departure review

Compare the forecast at the difficult checkpoints. Read the official alerts and their instructions. Confirm current road restrictions. Allow rest and fuel stops. Check again before leaving and at a safe stop if conditions change. Never operate this site while driving.