I took some screenshots of Toronto traffic during the complete shutdown of the Gardiner following that major accident at York on June 12. Remember the accident happened around 2pm (before rush hour).
It was literally impossible to navigate almost anywhere in a 5km radius of the Gardiner or the DVP from the moment that happened. I was in the Don Mills/Eglinton area trying to get to Union station and the traffic was horrid literally everywhere.
Photo #1: As we can see with the North-South routes: University, Yonge, and Jarvis were clogged. Not shown here but Bay St was a clogged mess as well.
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Photo #2: Shows the extent of the Gardiner closure. The DVP was clogged through the 404-401 interchange and Bayview, Broadview and Bloor took all of the overflow to which they couldnt handle.
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Photo #3: Pretty self-explanatory. The DVP was a clogged mess.
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Photo #4: Don Mills was a mess, Eglinton was a mess, Millwood was a disaster, Donlands was a joke
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Photo #5: Zooming back out we can see the fuller effects. Yonge, University, Jarvis, Dundas, Bloor, Queen, Richmond, Adelaide, Queens Quay, Lakeshore were all clogged to MAX capacity. This also means that all surface routes that run on the streets were jammed and were delayed to points where the TTC couldnt operate on any kind of a schedule. I didnt even take a picture of the 401 but we already know what that was like.
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So in short, let's remember this and frame these pictures for anytime there's the thought of tearing down the Gardiner. The city simply is not ready to handle the effects of that and until we have a transit network that's robust enough, it will not be ready anytime soon.