Toronto Union Station Revitalization | ?m | ?s | City of Toronto | NORR

TBH there's plenty of Presto machines at the stairs to the platforms and all over. I don't think that is a problem. You don't need to wait to the last minute to tap on.
I usually don't tap on until I confirm the train I need to grab is actually going, plus if there were screens when I exit the subway there's a chance I'd rush to the platform and forget to tap the 2 or 3 mins after I saw the time in the big hall on bay
 

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