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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

Montérégie

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, entre le chemin de la Petite-Rivière et l'A-30

Hindrance
Minor

Direction
West and east

From May 23, 2026 at 11:59 p.m.
to June 21, 2026 at 11:59 p.m.

340

À Vaudreuil-Dorion, entre l'A-30 et le boulevard de la Gare

Hindrance
Major

Direction
West and east

From April 19, 2026 at 9 p.m.
to June 17, 2026 at 5 a.m.