Remove Snow from a Car Before Driving in Nagano

Nagano rules prohibit driving with snow left on the roof or bonnet. It can slide onto the windscreen under braking or fall into the path of another vehicle.

Checked October 25, 2026. Confirm current weather, roads and provider conditions before travel.

ROOF: Clear before driving
VISIBILITY: All glass, mirrors and lights
WORK SAFELY: Stable off-road location

Clear the whole vehicle

Start with the roof, then clear the front and rear glass, bonnet, mirrors, lights, indicators and number plates. Do not create only a small viewing hole and begin driving.

JAF warns that roof snow can slide onto the windscreen during braking and block the driver's view.

Do not rush with boiling water

Avoid thermal shock and refreezing. Use the vehicle demister, scraper and snow brush according to the vehicle instructions, and do not force frozen wipers to move.

Choose a safe place to work

Stay away from moving traffic and slippery slopes. Use gloves and suitable boots. Ask the rental provider if the vehicle has no snow brush or scraper.

FAQ

Questions before driving

Practical answers for planning your route and rental.

Must I clear the roof?

Yes. Snow can block your view or fall into the path of following traffic.

Can I pour hot water on the windscreen?

Avoid it because of thermal shock and refreezing; use the vehicle's approved equipment.

Do the lights need clearing?

Yes. Clear lights and indicators so the car can see and be seen.

Sources

Nagano Prefectural Police winter-road rules / JAF snow and ice guidance