Do Traffic Lights Measure Speed?

[LeLogan]

Traffic light cameras can measure speed. Additional information is as follows: 1. Electronic Eye: Uses induction lines to sense the pressure transmitted by vehicles on the road, collects signals through sensors to the central processor, and temporarily stores them in registers. Within the same time interval (red light cycle), if two pulse signals are generated simultaneously, it is considered "valid." Simply put, if the front wheels cross the line during a red light while the rear wheels do not, only one pulse is generated. If there are no two consecutive pulses, no photo is taken. When the yellow light is on, the photo system is delayed by 2 seconds before activation. When the red light is on, the system is already active. When the green light is about to turn on, the system shuts down 2 seconds in advance, mainly to prevent false captures. 2. There are four types of speed cameras: fixed speed cameras, mobile speed cameras, average speed cameras (interval speed cameras), and hidden speed cameras.