
Passing through within one second after the red light turns on counts as running a red light, but if the driver's front and rear wheels have already crossed the stop line just before the red light turns on, it does not count. Traffic signals are generally divided into red, yellow, and green lights, and some intersections only have alternating red and green lights. Regarding the operation of traffic signal sensors, they usually start working when the yellow light begins to flash. If the driver's front and rear wheels have already crossed the stop line just before the red light turns on, this is not considered running a red light. The red light violation capture by electronic cameras requires three images to constitute a violation, but it does not rule out the possibility of traffic police manually verifying the evidence based on the captured images, as the sensor often takes about one second after the red light flashes to reset.

Having driven for over a decade, I've witnessed numerous accidents caused by drivers rushing through traffic lights. Whether crossing the intersection within the first second after the red light turns on counts as running a red light depends on whether your wheels have crossed the stop line at the exact moment the red light activates. If your entire vehicle is still behind the line when the light turns red, even by just one second, it's considered running a red light. Electronic traffic enforcement is strict, capturing three consecutive photos: your car before the line when the light turns red, your car crossing the line, and your car passing through the intersection. Once in the city, I nearly hit a curb by rushing those fractions of a second. Now, I start slowing down as soon as the green light starts flashing yellow—better to wait three minutes than risk one second.

After studying traffic regulations, it's clear that any part of a vehicle crossing the stop line after the red light turns on is considered a violation. For example, if you're still two meters away from the stop line when the signal turns red but dash across within a second, it definitely counts as running a red light. I always remind myself not to take chances while driving, as the surveillance systems are accurate down to the millisecond. Especially on rainy days when braking distances increase, it's crucial to ease off the accelerator when encountering a flashing green light. Rather than calculating the timing, it's better to develop the habit of anticipating in advance.

My driving instructor taught me that the moment when the traffic light changes from yellow to red is the most critical. As long as the car hasn't completely crossed the line when the red light fully illuminates, continuing to drive counts as running a red light, and that one second doesn't matter at all. I once almost violated the rule by accelerating hard in the last two seconds of a green light, only for the front wheels to just touch the line as the light turned red. Now, whenever I approach an intersection and see the green light flash three times, no matter how far away I am, I apply the brakes. After all, a 6-point deduction and a fine are minor compared to the serious consequences of hitting a pedestrian.

During every rush hour, I see people rushing through yellow lights, which is extremely dangerous. Running through a red light that has just turned on for one second definitely counts as running a red light because the change of traffic lights is a sudden event. On my 30-kilometer commute with twelve traffic lights, the experience I've summarized is: observe the countdown from 50 meters away from the intersection, and firmly slow down if the green light has less than three seconds left. Once, I witnessed a taxi rushing through a yellow light and getting hit by a car from the lateral lane and sent flying. So now, I don't even rush through yellow lights and always slow down to below 40 km/h when approaching an intersection.

As a parent who drives my child to school every day, I pay special attention to these details. Traffic laws state that if your wheels cross the line only after the light turns red, even if you speed through, it still counts as running a red light. There was a recent news story about a driver who got penalized for crossing that one-second threshold—the camera captured their license plate clearly. Now, when I approach an intersection, I switch to defensive driving mode by moving my foot from the accelerator to the brake. I recommend enabling the traffic light alert feature in your car’s navigation system to know the light change timing 200 meters in advance.


