Our state legalized go on red for mc's. First is that often a MC won't have the mass to trip the green light sensor and I think the most important reason is they get on down the road instead of in the intersection for stuff like this.
I'd sure love it if more motorists would just 'CLEAR' those intersections ! You would think they could at least make an effort to work together w/ eye-contact,etc. to get out of 'parking mode'