That's every event, there's no detours for the stampede parade either. Or globalfest. Or Calgary marathon.
Their doesn't need to be detours if it's only for a few hours, there doesn't even need to be signs. Detours are only if a closure lasts over 24 hours. Instead they make the information and closures as public as possible. Maps are posted on the website and plastered all over twitter, Reddit, etc.
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