Complete closure of Louis-Hippolyte-La Fontaine tunnel this weekend
Posted April 29, 2025 8:55 am.
Last Updated April 29, 2025 11:14 am.
There will be a complete closure of Highway 25 towards Montreal, including the Louis-Hippolyte-La Fontaine tunnel, this weekend – May 2 to 5.
The highway to the South Shore will also be closed on Friday and Saturday nights.
These obstructions are necessary in order to transfer the two lanes towards Montreal into the renovated tunnel.
Starting at 5 a.m. on Monday, road users will be able to drive through the renovated structure.
As a reminder, the clear height in the tunnel has been reduced from 4.4 m to 4.3 m. This change, which came into effect Tuesday morning, is permanent.
Charron Island will be accessible again via Exit No. 1 – Charron Island in both directions. The ramp to access Montreal from Charron Island will be closed until the end of 2026. A detour route will be set up via the South Shore.
The Ministry invites users to be vigilant since the new configuration of the lanes will require a period of adaptation.
Highway 25 toward Montreal
- Complete closure of Highway 25 toward Montreal (including the Louis-Hippolyte-La Fontaine Tunnel) between Exit No. 90 – Highway 20 West, Route 132, La Prairie / USA, Varennes, Airport P.-E.-Trudeau and the entrance from Hochelaga Street, from Friday 11 p.m. to Monday 5 a.m.
- Closure of the entrance from Hochelaga Street, from Saturday 10:30 p.m. to Monday 5 a.m. During this period, users will be able to access Highway 25 through the next entrance from Sherbrooke Street East.
The entrances to this section will be closed 30 minutes before the highway is completely closed.
Highway 25 toward the South Shore
- Complete night closure of Highway 25 toward the South Shore (including the Louis-Hippolyte-La Fontaine tunnel) between exit 4 – Montréal (downtown) / J.-Cartier Bridge and the entrance from Île Charron, from Friday 11 p.m. to Saturday 8 a.m. and from Saturday 11 p.m. to Sunday 9 a.m.
- The entrances to this section will be closed 30 minutes before the highway is completely closed.
- Souligny Avenue eastbound, between Dickson and Honoré-Beaugrand streets, will be closed 30 minutes before the highway is completely closed.
These closures are subject to operational constraints and favourable weather conditions in order to proceed with the marking of the roadway.
The Ministry encourages you to visit quebec511.info before heading out on the road or call 511 for up to date closures – and to plan your trip.
