One thing I was surprised by when driving in Coquitlam where I have cousins is that drivers there would start moving right after the green. This is strange to me because drivers in San Francisco will frequently be stationary for seconds afterwards. Looking at the rough statistics, it appears the RCMP police for smartphone usage in a stricter manner than SFPD does (or at least they write more citations) which makes me think that drivers in that region have adapted by not using their smartphones as much.

I wonder if this metric of "traffic light change to driver action" delay is a thing we could use as a performance metric for how well cities are ensuring smartphones aren't used by drivers.