The Quebec Ministry of Transport and Sustainable Mobility announced that the southbound direction of Highway 25 and the Louis‑Hippolyte‑La Fontaine tunnel will be closed from October 9 to October 13, 2026. Drivers are being routed to the Champlain Bridge as an alternate crossing.
The detour via the Champlain Bridge will operate from October 9 through October 11, 2026, covering the main days of the Thanksgiving holiday weekend.