MONTREAL -- Those heading into Montreal from the South Shore should know that there will be work in the Louis-Hippolyte-La Fontaine tunnel as well as the Highways 20 and 30 interchange this weekend.

It would be wise to avoid these and other reasons below where roadwork is scheduled.



From Saturday at 12:30 a.m. to Monday at 5 a.m., the following closure will be in effect:

  • Between Longueuil and Montreal, Highway 25 North between exit 90 (R-132, A-30, La Prairie, Varennes) on Highway 20 West and the Notre-Dame East / Curatteau entrance, including the Louis-Hippolyte-La Fontaine tunnel.

As a result, the following are default closures as of 11:30 p.m. on Friday:

On the South Shore

  • The Route 132 East and West ramps (exits 89-N) to Highway 25 North.
  • The east and west entrances to Marie-Victorin Blvd.
  • The Île-Charron Street entrance. (Access to Île Charron remains open and channelled via the east and west entrances of Marie-Victorin Boulevard.)

La Fontaine tunnel closures Dec. 3 to 6HIGHWAY 20 / HIGHWAY 30 INTERCHANGE

From Friday at 10:30 p.m. to Monday at 5 a.m., the following closure will be in effect:

  • In Boucherville, the Highway 20 East ramp to Highway 30 West / Vaudreuil-Dorion


  • Between Montreal and Brossard, at the end of the Samuel-De Champlain Bridge towards the South Shore (A-10 East, A-15 South), two of three lanes will be closed on Saturday and Sunday from 5 a.m. to 4 p.m.
  • In Montreal, two lanes will be closed on Papineau Ave. southbound between Sherbrooke and Ontario streets, from Friday at 9:30 a.m. to Monday at 6 a.m.

All work may be cancelled due to weather. For more information and detours, visit the Mobility Montreal website or its Facebook page.