From a logistics perspective, I would suggest a 10-minute window is problematic, depending on how big the streets are and the perimeter. In that area, they allow themselves about 10 minutes to secure and close down the streets, because they have traffic on Wellington that has to be stopped, as well as other vehicles along Bank Street coming across directly. All those pieces have to fall into place, and we can't do it safely in one instant. It has to be phased in.
On October 21st, 2014. See this statement in context.