Take a trip into the Highway 401 and 409 Rail Tunnel project.

We’ve had lots of stories on the big dig, under some of the busiest highways in the country, but this new drone footage caught our eye.

This view shows the work in building a twin rail tunnel structure underneath 21 live lanes of traffic, and supports GO Expansion on the Kitchener line. The tunnels will accommodate future track, enabling more frequent, two-way, all-day train service.

Here’s a past story on the project.

See the videos – Highway 401 and 409 Rail Tunnel project completes excavation in tunnel two

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