Half of the lanes on the Honoré-Mercier Bridge will be closed for seven weeks beginning this evening as crews repair the structure.

As of 9 p.m. Friday, drivers crossing the Mercier Bridge will only be able to use one lane in each direction until August 11.

The major repairs will see the bridge deck of the federal section replaced, including the portion that spans the St. Lawrence Seaway.

To improve circulation, large vehicles will be prohibited from crossing during morning and evening rush hours.

Mercier construction

Construction on the Honoré-Mercier Bridge is planned from 9 p.m. today until 5 a.m. on August 11. (Jacques Cartier and Champlain Bridge Incorporated)

Continuing repairs

Since 2007, more than $120 million has be invested in the bridge’s maintenance and repair.  

Quebec’s Ministry of Transport plans to spend at least an additional $300 million in the coming years to delay the bridge’s deterioration.

The province also says it is doing studies to determine whether the structure should be demolished and a new bridge built in its place.

The Ministry of Transport says it will make that decision within a year. 

Traffic disruption on the Honoré-Mercier Bridge

  • Speed limit will be 50 km/h.
  • One lane open towards Montreal (width 3.3 meters).
  • One lane open towards the South Shore (width 3 meters).
  • Service road between Route 132 and 138 with be closed and detoured by Old Malone Road.
  • Service road between Route 138 and 132 will be open.
  • Access ramp from Châteauguay towards Montreal will be closed.
  • Access ramp from La Prairie towards Montreal will be open.
  • Access ramp from Airlie Street towards the South Shore will be closed.
  • Exit towards La Prairie open.
  • Exit towards Châteauguay open.
  • Exits on Montreal shore open.