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Québec 511 > Trucking > Hindrances Related to Load and Size > Route 343

Route 343

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

Thaw

Thaw period

From March 16, 2026
to May 15, 2026

Thaw period

From April 13, 2026
to June 12, 2026

Thaw period

From April 20, 2026
to June 19, 2026

Laurentides—Lanaudière

Alternating traffic R-343 at height rivière L'Assomption, SOUTHBOUND and NORTHBOUND, Saint-Paul, undetermined period. Reason : Inspection.

April 14, 2026
at 2:49 p.m.

Contraflow traffic rue Baby on the bridge, 1 lane in each direction. Lane width: 3.2 meters, WESTBOUND and EASTBOUND, Joliette, undetermined period. Reason : Inspection.

September 23, 2025
at 10:13 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.

343

Alternating traffic R-343 at height rivière L'Assomption, SOUTHBOUND and NORTHBOUND, Saint-Paul, undetermined period. Reason : Inspection.

April 14, 2026
at 2:49 p.m.

343

À Saint-Paul, rue du Curé-Dupont, à la hauteur du chemin Saint-Jean

Hindrance
Minor

Direction
South and north

From December 19, 2023 at 4 p.m.
to December 31, 2026 at 11:59 p.m.