I've noticed that too. I was on summit heading towards 11th ave on osu campus a couple weeks ago around midnight. the light at 12th was green and went to yellow and was instantly red. i had plenty of time and room to stop but i went from ~45mph to stopped fairly quickly. the sensors must have been activated because i came to a stop and the red light cam flashed. so all they got was a pic of me sitting on the bike with my hands off the bars and my foot down