Weekend traffic: Major disruptions in Laval, downtown and around the Big O

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Some trouble spots on Montreal highways to look out for this weekend:

Highway 40 (Île-aux-Tourtes Bridge)

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Only one lane will be available toward Montreal from 10 p.m. Friday to 5 a.m. Monday as maintenance work continues on the bridge. Two lanes will be available toward Vaudreuil-Dorion.

Route 138 (St-Pierre Interchange)

The ramp from Route 138 east (from the Mercier Bridge) to Highway 20 west will be closed from 11:59 p.m. Friday to 5 a.m. Monday.

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Highway 13 (Laval)

The highway will be closed northbound through the city at various parts over the weekend:

There will also be a partial closure on Saturday, with only one lane available, between Exit 12 and Dagenais Blvd.

Route 335 (Laval)

Will be closed in both directions between Dagenais Blvd. and Laurentides Blvd., from 10 p.m. Friday to 4 a.m. Monday.

Highway 440

Will be closed westbound between Industriel Blvd. and Highway 15, from 7 p.m. Friday to 5 a.m. Saturday, with traffic diverted to the service road. Two lanes will also be closed westbound over the same stretch from 7 p.m. Saturday to 5 a.m. Sunday. Detour is via the service road. The exit for Industriel Blvd. will be closed as of 5 a.m. Monday, with a new ramp put into place.

Highway 30 (Valleyfield)

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One of two westbound lanes on Serge-Marcil Bridge will be closed over the St. Lawrence River from 8 p.m. Friday to 6 a.m. Monday.

Décarie Blvd.

Two of three lanes will be closed northbound at Plamondon Ave. from 9 p.m. Friday to 5 a.m. Monday.

Olympic Stadium

The Metallica concerts this weekend will involve closing the following streets, from 9 a.m. Friday to 3 a.m. Saturday and from 9 a.m. Sunday to 3 a.m. Monday:

Smaller streets in the area will be available only to local traffic, and Marseille St. will be two-way on those days. Proof of address will be asked for people driving home.

Downtown

Two parades will prompt street closures downtown this weekend:

Amitié nuestroamericana: René-Lévesque Blvd., Robert-Bourassa Blvd., Ste-Catherine St., among others, from 3 p.m. to 6 p.m. Saturday

Pride Parade: René-Lévesque Blvd. between Guy St. and Metcalfe St. from 7 a.m. to 3 p.m. Sunday, and between Metcalfe and Alexandre-DeSève St. from noon to 6 p.m. Sunday.