It"s been included in various proposals and presentations about the arena. Corporate stalls could be used since the games take place outside of general business hours, it would just be up to the corporations or their garage owners to come up with a system that works for everyone. I doubt that they"re going to let hundreds or thousands of stalls sit empty when they could be selling them for hockey games.
As far as 20,000 people exiting all at once, again, this would be from dozens of surface and underground lots and buildings spread over a large radius. And of course it wouldn"t be nearly that many anyway, unless no one used transit and everyone drove there by themselves. As it stands Rexall essentially has two lots with basically 3 entrances/exits, most people drive to the game, and the area copes fine. The downtown location is much more suitable to such crush loads because they"d be much more well distributed and there"s far more arterial roads and transit options nearby. Not to mention the hanging out before and after the game aspect that a properly designed district would provide that would further ease crush loads on roads, transit and parking.
Again, the Saddledome is a shitty comparison. Think Nationwide in Columbus, but with zero surface parking nearby:
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