Here's an intersection I've had trouble with: The red box shows the grooves in the pavement where the sensor wires are. Note the obvious flaw. If you don't pull up past the stop bar then you won't be seen, car or bike. The lights can cycle for the crosswalk or opposing traffic, but won't turn green for this lane unless there is a car in this lane. The sensor does not pick up bikes even if you park in the front left corner with your wheels directly on the seam. If you DO pull up past the stop bar then you have committed an offence, you are going to get honked at by people turning left across the front of you, and if one of them clips you on the way pas then it's YOUR fault. I run this light pretty much every time I come to it - but I still have to wait two cycles. Another one for the city engineer to sort out.