MONTREAL -- Though construction on Montreal major roadways has slowed considerably over the winter, closures are expected this weekend at the Saint-Pierre Interchange and other sites in the region. The Ministry of Transport advises avoiding the following spots. SAINT-PIERRE INTERCHANGE The Highway 20 East ramp to Route-138 West (exit 63) towards the Honore Mercier Bridge. As a result, the following is a default closure. The 1st Ave entrance for Route-138 West. HIGHWAY 10 From Saturday at 8 p.m. to Sunday at 9 a.m., the following closure is in effect: In Brossard, Highway 10 East between the Taschereau Blvd. exit (8) and the Milan Blvd. entrance.