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Québec 511 > Road Conditions > By Region and by Road > Route 340

Route 340

Road Conditions Information on winter road conditions is updated once a day between 3 a.m. and 6 a.m. from October 15 to April 15 inclusive, and every time road conditions change.

Information on winter road conditions is updated once a day between 3 a.m. and 6 a.m. from October 15 to April 15 inclusive, and every time road conditions change.

Roadway

Bare (dry or wet)

Partly snow covered, snow packed

or ice covered

Snow covered, snow packed

or ice covered

Visibility

Good

Fair

Poor

Roadwork

Some informations are available in french only.

Minor hindrance

Major hindrance

Other informations

Warning

Trucks prohibited

Ferry

Border crossing

Current Warnings

Difficult weather conditions are coming to all of Quebec this Thursday and Friday; snow, wind and rain, depending on the region, could lead to slippery roads and reduced visibility in some areas.

Plan your trips and be careful.

December 17, 2025
at 6 p.m.

Montérégie

Closure R-207 In Kahnawake, from Monday to Friday between 5:30 a.m. and 9:00 a.m., NORTHBOUND, undetermined period, detour A30 EST, A730 NORD, R132 OUEST. Reason : Roadwork.

November 12, 2025
at 9:30 a.m.

Louis-Hippolyte-La Fontaine tunnel

Height clearance reduced to 4.3 meters since May 5, 2025. Recreational vehicles, among others, make sure to respect the height clearance before including the tunnel in your itinerary. .

June 18, 2025
at 11 a.m.

340

À Vaudreuil-Dorion Sur le boulevard de la Cité-des-Jeunes à la hauteur de la rue Henry-Ford

Hindrance
Minor

Direction
West and east

From December 18, 2025 at 11 p.m.
to December 19, 2025 at 7 a.m.