They're doing some reconstruction along the south side of Bloor Street, at least between Avenue Road and Yonge Street. While I don't know with 100% certainty what they're doing, it's more likely than not part of that sidewalk rehabilitation project that was in the news last year, the one that had some of the streetside merchants up in arms about lost business during construction. I can understand their hesitancy now - there are some businesses that have to be accessed by temporary bridges over the trench, marked with signs saying that each business is "OPEN FOR BUSINESS" - and it's good that they went that extra mile because if their door's open, lights are on inside, and they've gone so far as to put down a bridge between the pedestrian corridor and the door, I know my first thought would be "this place is obviously closed."
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