Is running a red light captured from the front or the back?
3 Answers
Running a red light is generally captured from the back, using electronic cameras to take three photos for determination: a photo of the vehicle crossing the intersection stop line, including the traffic light showing red and the license plate number; a photo of the vehicle completely passing the stop line, including the traffic light showing red and the license plate number; and a photo of the vehicle continuing to move, comparing the vehicle's position to see if there is any change, including the traffic light showing red and the license plate number. Capturing these three photos can determine that the vehicle has run a red light. The act of running a red light is clearly defined in the "Road Traffic Safety Law." Article 26 states that traffic signals consist of red, green, and yellow lights. A red light indicates prohibition of passage, a green light indicates permission to proceed, and a yellow light serves as a warning. A red light is a traffic signal prohibiting passage, and if a vehicle proceeds through an intersection when the light is red, it constitutes the traffic violation of running a red light. Six scenarios of running a red light: Stopping immediately after crossing the line at a red light (when the light turns red, the vehicle cannot stop in time, and the front of the vehicle crosses the stop line): If the vehicle has just crossed the stop line when the light is red but stops immediately, this act of running a red light will not be penalized. However, if there is obvious movement after crossing the line, it will be penalized. The three photos captured by electronic cameras for running a red light are: 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 present will it be considered running a red light, resulting in a 6-point deduction under the new regulations. Running a red light under the direction of a traffic officer (the signal light is red, but the officer signals to proceed): When there is a conflict between the traffic signal and the officer's gesture, the driver must obey the officer's on-site command. If the driver runs a red light due to the officer's command, they can obtain a diversion certificate from the local traffic police station to avoid penalties. If the driver disagrees with the penalty, they can appeal through administrative reconsideration or administrative litigation. Stopping after the entire vehicle crosses the line at a red light (failing to brake in time, causing the entire vehicle to cross the stop line): If the vehicle stops after completely crossing the stop line without further movement, it is not considered running a red light. However, this constitutes stopping beyond the line. According to Article 4, Item 5 of the "Road Traffic Safety Violation Scoring Standards," failing to drive or stop as required at an intersection results in a 2-point deduction. Reversing after stopping beyond the line (attempting to avoid penalties by reversing after stopping beyond the line at a red light): Vehicles are not allowed to reverse at railway crossings, intersections, one-way roads, bridges, sharp turns, steep slopes, or tunnels. Violations may result in a warning or fine. Accidentally running a red light behind a large vehicle (due to the large vehicle blocking the view, following it through the intersection): Drivers must maintain sufficient visibility to see the traffic signals ahead and ensure a safe braking distance. Generally, if a vehicle is captured running a red light behind a large vehicle, it is due to rushing through the intersection. This behavior will be penalized as running a red light. Proceeding through an intersection at a yellow light (passing through the intersection when the light turns yellow): Traffic authorities state that according to the "Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China," vehicles that have already crossed the stop line when the yellow light is flashing may continue to proceed. If the driver continues to rush through after the yellow light has turned on, it will be considered running a red light if captured.
I fully understand this issue. Based on years of driving experience, red-light cameras mostly capture vehicles from the front. They are usually installed on traffic light poles or gantries at intersections, directly facing vehicles about to enter the junction. Why this design? It allows clear capture of license plate numbers, front-end vehicle features, and the driver's seat position, making it easier to identify violating drivers. I remember driving in Shanghai and seeing such cameras multiple times—they detect vehicle movement after the light turns red and snap instant photos. Of course, there are rare exceptions, like in rural roads where cameras are mounted on trees or poles to capture the rear of vehicles, but that's uncommon. Whether front or rear-facing, running a red light is high-risk behavior, often leading to accidents, injuries, or police pursuit. I advise fellow drivers to develop good habits: slow down at intersections, observe light changes carefully, and wait an extra few seconds rather than risking it for time. If caught, there’s not just a hefty fine but also penalty points affecting insurance costs. In short, safety first—avoid unnecessary trouble.
From a technical perspective, the installation positions of red-light cameras vary depending on the system. Many cities deploy front-facing cameras that directly capture oncoming vehicles, which allows for more efficient recording of license plate details and the dynamic process of vehicles entering intersections. Others utilize rear or side-angle cameras to avoid blind spots and lighting issues. In terms of operating principles, radar or induction loops trigger the camera shutter, and after capturing the license plate, the system automatically processes the data to generate a ticket. Modern systems also incorporate AI algorithms to enhance accuracy. I once experienced this firsthand while driving in Shenzhen, where I encountered a new type of camera capable of multi-angle capture and clear nighttime imaging via infrared functionality. Don’t underestimate these cameras—even a momentary stop beyond the red line can be recorded. Safe driving is paramount; following the rules protects both yourself and others.
