Originally Posted by
Darth Lefty
You can go over and punch the crosswalk button, or wait for a gap in oncoming traffic.
Cuts in the road are usually not for a scale but for a hoop of wire that creates a donut shaped induction field and the best way to trigger it is to park along the wire so that your bike interrupts the maximum amount of the field.
(image from DriveSmartBC found on google)
I have a couple of these on my commute route as well, and just with experimentation of positioning I figured out that's where to stop to trigger the light change.