metrolinx construction

A massive new tunnel is being built beneath highway 401 in Toronto

Under 21 lanes of Highway 401 and 409 traffic, Metrolinx has started the construction of a GO Transit tunnel to add new tracks to the Kitchener line.

The construction will create two single-track tunnels, just two metres north of the existing GO Transit tunnel.

Once the project is complete, there will be  two-way, all-day GO service every 15 minutes on the line, with additional service during peak hours.

The “twin tunnel” will span 176 metres long, beneath “one of the busiest sections of highway in North America,” according to Georgina Collymore, Metrolinx's senior advisor.

She says the work shouldn’t impact highway traffic.

One significant change has already resulted from these construction plans. The Etobicoke North GO Station is closing down. Major changes would have had to be made to the station in order for it to remain open.

A new station will open at Highway 27 at Woodbine racetrack. This new station will be privately funded by Woodbine Entertainment.

The tunnel construction is projected to be completed by 2021 and has been valued at $116.9 million.

Lead photo by

Infrastructure Ontario 


Latest Videos



Latest Videos


Join the conversation Load comments

Latest in City

A brief history of the Little India neighbourhood in Toronto

This is what Queen's Quay in Toronto looked like before the condos

That time when Pizza Pizza hypnotized Toronto

Here are all the places in Toronto you can get discounts with your PRESTO card

The history of when Toronto got its first subway

This just might be the Toronto area's coolest gas station

Concrete barrier is proving a prime spot for Toronto cars to do sick rail grinds

Someone made a parody of Doug Ford's controversial Super Bowl commercial