Canada Day this year (and last year) was held on LeBreton Flats because Parliament Hill is a huge gaping hole. Canadian Heritage and the Ottawa Police decided to close the closest station, Pimisi, because of safety concerns. The OPS is peddling lies about the station being underbuilt to handle large crowds, while at the same time really only pointing to limitations with the road overpass the station sits under.
The local media has been running wild with this for days. Can LeBreton handle an arena!?
Fact of the matter is, Canada Day sees 30k,40k,50k while an arena would only be 17k. Where the Canada Day site sites, it's only really accessible to Pimisi, not Bayview (one key pathway to Bayview was closed). The arena will sit in between. Even then, it's really just a case of bad planning and the Police not wanting to do crowd control, like what's done in Montreal for the F1. It would be even easier at Pimisi since we can see the platform from the bridge and there are multiple entrances.
Even with all of this, Pimisi handled Bluesfest fine last year. More predictable than Canada Day (as it's a ticketed event) but larger crowds than NHL hockey.
Here's Pimisi:
https://www.railfans.ca/otrain/station/pimisi
How do other cities handle large crowds? Either hockey or larger events?