
The camera does not capture immediately when the yellow light turns off; it only starts capturing three seconds after the red light turns on. The determination of running a red light is based on the camera capturing three photos simultaneously: the front wheels crossing the stop line, the rear wheels crossing the stop line, and the front wheels crossing the opposite stop line. Only when all three photos are captured by the camera can it be proven that a red light was run. Traffic signals are lights that direct traffic and generally consist of red, green, and yellow lights. According to the "Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China," Article 38 states: (1) When the green light is on, vehicles are permitted to proceed, but turning vehicles must not obstruct the passage of straight-moving vehicles or pedestrians; (2) When the yellow light is on, vehicles that have already crossed the stop line may continue to proceed; (3) When the red light is on, vehicles are prohibited from proceeding.

After driving for so many years, I've noticed that the electronic eye reacts very quickly when traffic lights change. The moment the yellow light ends and the red light comes on, the capture system is already activated. However, the key is whether the rear wheels have crossed the stop line before the red light turns on. It's safe if the front wheels cross the line just as the yellow light goes off, but if the rear wheels cross when it's already red, you'll definitely be captured. My advice is not to rush when you see the yellow light come on, especially for those who are just learning to drive—it's best to develop the habit of waiting an extra three minutes rather than rushing a second. Some intersections have particularly sensitive sensors that can trigger photos even if your wheels are on the line during the transition from yellow to red. Getting fined and penalized isn't worth it.

Last time I was waiting at a red light at an intersection, I specifically timed the traffic light changes. The yellow light lasts about three seconds, and the intersection camera activates immediately when it turns red. Although the system takes half a second to react before starting to capture images, this time window is so short that it's impossible to react in time. In reality, only vehicles that continue moving after the light turns red get captured. Remember, the rear part of your vehicle must completely pass the stop line to be considered safely through. Many people mistakenly think there's a buffer time after the yellow light ends, only to realize the camera shows no mercy when they get fined.

The moment the yellow light ends and the red light turns on, the camera system circuit is activated. However, two conditions must be met simultaneously to trigger a photo: the red light is on + the vehicle crosses the stop line. So if you pass the line before the yellow light ends, you won't be caught. But the risk of rushing that last half-second is extremely high—I've personally seen cases where the front of a car just crossed the line as the light turned red, and the entire vehicle was still on the stop line when it got photographed. The sensitivity of traffic cameras varies by location, so don't gamble your driver's license points on the system's reaction speed.


