Upgrades to the Coquitlam River Bridge on Mary Hill Bypass

Notice

The Ministry of Transportation and Transit is upgrading the Coquitlam River Bridge on Highway 7B/Mary Hill bypass to add resilience to the transportation network and enhance safety for people who rely on the road.

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map of construction area for coquitlam river bridge on mary hill bypass

December 3 Update from Ministry of Transportation and Transit:The current plan during construction is to maintain two lanes of vehicle traffic in both directions for the anticipated 1-year duration of the project.  The width of the lanes has been reduced to 3 metres and the posted speed to 40 km/hr in the construction zone. 

However, out of an abundance of caution, many motorists are choosing to merge into a single lane in spite of the project signage and information shared indicating that two lanes should be maintained. Based on the observations of the project contractor and Ministry staff, it appears that the existing road markings may be contributing to motorists’ confusion.

As such, the existing lines on the roadway will be removed this week and delineators installed to clearly identify the new travel lanes. We anticipate that this should help to resolve the confusion, enhance safety and eliminate the extended delays being experienced.

Construction projects of this nature require significant planning and preparation in advance of actual construction. Much of the preparatory construction work was conducted overnight during the week of Nov. 23-30, 2025. The contractor installed concrete barriers, reduced lane widths and developed the pedestrian-bypass area during this period in order to minimize the impacts on motorists during daytime commuting hours.

For more detailed information on construction, traffic impacts, and timelines, read the Government of BC's full notice.

The Coquitlam River Bridge upgrade project includes the construction of a multi-use path on the south side of the bridge, as well as seismic and drainage upgrades, climate adaptations, including abutment and embankment modifications and concrete replacement, enhanced safety measures for cyclists and a new cultural art fence.

Contact the Ministry of Transportation and Transit with any questions or concerns: