Originally Posted by
jon c.
Are they simply detectors or are they tied to red light violation cameras? I'm guessing the video detectors on our red light cameras would pick up a bike. But the sensors for the lights are still in the road. It's a theoretical question for me as I only encounter such an intersection during the day and I've never been the only 'vehicle' in the left turn lanes, so I don't know if they'd detect me alone or not. It's not a light you'd run during the day without a death wish in any case.
There are two types of traffic cameras. Ones for enforcement, like you're talking about, and ones that are for triggering the lights to change.
The latter are typically much smaller and are useless for enforcement. Their purpose is to watch for anybody pulling up to the line, and that's it. These work great in the Denver area.