It is a railway going over a road yes - which makes it a subway.
It is in Toronto.
It was originally designed and built in 1913 and I did the rehabilitation design in 2007 with construction recently having been completed.
In the above photo, the bridge is supported by a temporary structure under the bridge (you can see the temporary columns and footings on the left) to allow the trains to continue to pass overhead while we demolish the original foundations that supported the columns of the bridge (note the 2 hoe rams blasting away at the old concrete). We then install rather large steel pedestals that weight about 15,000 pounds each (or grillages) that get cast right into the new foundation wals (front right)
To give you an idea of the size of the pedestals....