That street (Dundas Sq.) gets very little traffic, but it does give access to the garage and to the lane that runs between Yonge and Victoria. I don't think that closing it would make much of a difference to the square. Besides, the square is constantly busy anyway. Maybe not quite a clogged as it can get by the Eaton Centre entrance… but that's why it's so clogged there: people are going in and out of the Eaton Centre!
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