Highway 99 Tunnel Program Highway 99 Tunnel Program
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Steveston Interchange Project Overview

The Steveston Interchange Project is a key part of the Highway 99 Tunnel Program to improve travel along the Highway 99 corridor. As part of the broader program, the new Steveston Interchange will improve connections for vehicles, transit users, pedestrians and cyclists.

Opening in 2025, the modernized interchange will provide more vehicle lanes, improve transit operations, and include sidewalks and cycling lanes on both sides of the structure for the first time.

The project includes:

  • Replacing the existing two-lane interchange at Steveston Highway and Highway 99 with a five-lane structure. The new structure will include two eastbound lanes and three westbound lanes, including a left-turn lane onto Highway 99, to improve traffic flow. 
  • Improved ramp connections between Steveston Highway and Highway 99 to improve traffic flow and reduce queuing for vehicles.
  • Several transit-priority measures to allow buses to move through the interchange more efficiently, including signal priority at intersections, and a dedicated transit lane and in-lane bus stop in the northbound offramp.
  • Sidewalks and separated bike lanes on both sides of the overpass to provide safe connections for pedestrians and cyclists travelling across Highway 99.

With the opening of the new interchange, travel time and reliability will be particularly improved at the northbound offramp from Highway 99 to Steveston Highway and for westbound through-traffic along Steveston Highway.

Once the new tunnel is in place, travel time and reliability will be improved for traffic headed from Steveston Highway into the tunnel, further reducing congestion at the Steveston Interchange.

  • Status: Contract awarded to Flatiron Constructors Canada Limited
  • Project Cost: $87.5 million
  • Schedule: Construction began in mid-2022 with completion in 2025, including removal of the existing structure.

If you have questions about construction, please email StevestonProject@flatironcorp.com or call the construction information phone line (24/7) at 1-888-270-1075.