I allowed for folks who had clearly committed to the intersection as the light turned yellow. If anything, this is an under-count of violations, as I was fairly forgiving of various questionable acts. For example, I did not count drivers who entered the intersection to make a left turn and got stuck. I did not count drivers who entered the intersection within a few seconds of the yellow, or who seemed to be unable to stop (and weren't egregiously speeding). I did not count drivers who ended up in the intersection after the light turned red if it was due to another driver's behavior. I looked specifically for intent -- for instance, a change of velocity indicating that the driver was responding to the yellow light and making an explicit decision to violate the law.
I have broadly categorized the violations as follows, in this summary:
- 114 total moving violations in one hour (12:48 to 13:48)
- 23 instances of drivers blatantly speeding through the red light, even though they had plenty of time to stop.
- 63 instances of drivers choosing to slowly roll into the intersection when they could easily have stopped.
- 28 illegal turns-on-red (No Turn on Red is posted on all directions).
This is a heavily trafficked intersection for people on foot because of all the businesses. I also observed a number of bicyclists who stopped and waited for the red light. I did not see any bicyclist blow through the red light.
Notable violations: a fuel tanker accelerated on Harvard south-bound dangerously and ran the red light. A police officer on a motorbike flagrantly blew through the light going east on Brighton, no lights flashing. A silver hatchback with plates MA 14XZ79 stepped on the gas to get through the red light going west on Brighton, and nearly rammed another vehicle, just stopping short in time. A heavy public works vehicle also ran the red light going south on Harvard.
I noticed (and you can see in the data) that drivers were more likely to roll through the light on Harvard Ave, but much more likely to speed through the red light on Brighton Ave. I suspect this is because traffic moves more slowly on Harvard than on Brighton; the latter functions almost as a 4 lane highway at this point. Also it became apparent that there was a significant difference regarding turn-on-red violations among the different corners: the corners with sidewalk bulb-outs saw fewer turn-on-red violations than the clipped corners. It looks like the clipped corners may actually invite more reckless turning motion.
It's easy to find cases of moving violations here. I counted 114 violations in one hour. There is no justifiable excuse for BPD D-14 to be putting any traffic safety resources they have available towards anything else until they first address the complete lack of enforcement of motor vehicle safety here.