Tunnel de la mort, Road intersection in Rosemont–La Petite-Patrie and Plateau-Mont-Royal, Montreal, Canada

The Tunnel de la mort is the intersection of Rue d'Iberville and Boulevard Saint-Joseph, on the border of Rosemont–La Petite-Patrie and Plateau-Mont-Royal. Three railway overpasses stand immediately north, east and west of it, and concrete retaining walls occupy all four corners. Saint-Joseph narrows from six to four lanes here, and Iberville drops to two lanes in the underpass just north before splitting into the one-way Iberville and Frontenac.

The intersection earned its nickname after more than 250 serious accidents were reported there between 1992 and 2002. In September 2001, transport minister Guy Chevrette cited it as a spot too dangerous for a patrol car, arguing for photo-radar. Roadwork began on 4 April 2002 with the demolition of the overpass above Saint-Joseph Boulevard, just west of the intersection.

Residents of Montreal call this intersection the Death Tunnel because of its dangerous reputation and history of frequent crashes. The name reflects the everyday concern that drivers feel when passing through this location.

Drivers should note that left turns are prohibited at this intersection and Saint-Joseph Boulevard narrows from six to four lanes. The reduced road capacity requires constant attention, as congestion and confusion can occur easily, especially during peak hours.

On April 4, 2002, work began with the demolition of the overpass above Saint-Joseph Boulevard just west of the intersection. The Ministère des Transports du Québec expected the tunnel to be fully demolished and rebuilt by July 2010, yet as of February 2024 it still stands.