Originally Posted by KanataZ

I'm speculating because I obviously don't have all of the facts, but from what you've said, it sounds like you entered the intersection when your light turned green without 'clearing' the intersection. As a car driver and especially when I'm on two wheels, I make it a habit of ensuring that traffic actually stops on their red. IMO it's a huge risk relying on the colour of the traffic light to decide whether or not I can safely pass thru or enter an intersection.