CBC.ca: Ottawa police stop 24/7 monitoring of checkpoints.
https://www.cbc.ca/news/canada/ottawa/ottawa-police-stop-24-7-monitoring-checkpoint-gatineau-1.5995749
That was quick. Sounds like they're still stopping people. But it'll just be a random best effort thing.
@pete imagine trying to stop the spread of a respiratory virus by having a few police officers approach every driver, make them lower their windows, talk to them from less than 2m away etc