In my experience, Toronto's subway just stops when there is a power
outage. I did a bit of poking around and power is supposed to come from two
independent substations so that power can be switched over. There is battery
backup, but it isn't for traction. In case of longer term outage at a
station, generators can be brought onsite. But again, these generators
aren't intended to supply traction power.

The New York subways system operates under different rules and different
expectations, running 24 hours a day. And it operates tunnels under
water. Not only does the Toronto subway shut down every night but
periodically it partly shuts down on a weekend for maintenance or
upgrades. The risk here is that because of the opposition to shutting down
for maintenance, the maintenance and upgrades take years and years longer
than they would elsewhere.

By admin