Today, I was down at Fleet Street looking at the site of reconstruction planned for May and found that the 511 service is all running to Union Station. The track on Fleet is in very bad shape including one quite serious drop in the rail height.
I just checked the Transit Toronto website where there is a description of the situation — a car derailed last week and the line is closed west of Bathurst.
Of course the TTC’s own website does not even mention this diversion.