East York site selected for Ontario Line maintenance and storage facility

The train maintenance and storage facility,a critical component of the Ontario Line, will be built on a 175,000-square metre site. Once completed, it will become the central location for the upkeep, repair and resting place for the subway trains, when they’re not busy helping move people around Toronto.   After several months of study and … Continue reading East York site selected for Ontario Line maintenance and storage facility

Twin tunnels, single bores and megabores – Local subway planners face choices on what will work best for new lines

Each new subway tunnel is as unique as its surrounding neighbourhood and geology. While six-metre, twin tunnels were once considered standard, more recent technology has made larger, single tunnels possible. This article reviews the different sizes of tunnels and the factors that go into choosing one. Let’s get out the tape measures - the really … Continue reading Twin tunnels, single bores and megabores – Local subway planners face choices on what will work best for new lines

The art and science of building subway tunnels – One size doesn’t fit all

In the dark, all subways tunnels can look alike, but each one is unique. Some are bored and others are mined. The length of a line and the geography of the neighbourhoods it goes through influences how a tunnel is created. A whole series of decisions about each tunnel must be made before construction can … Continue reading The art and science of building subway tunnels – One size doesn’t fit all