How is speeding violation calculated for highway section speed measurement?
3 Answers
Highway section speed measurement calculates speeding violations in the following way: Speed monitoring equipment is installed at both the entry and exit points of the monitored section. The system captures one photo when the vehicle enters and another when it exits. By combining the timestamps of these two photos with the time taken for the vehicle to pass through the section, the system automatically calculates the vehicle's average speed within that segment. This average speed is then compared with the maximum speed limit for that road section to determine whether the vehicle was speeding. Methods to avoid being caught speeding by section speed measurement: 1. Maintain steady driving: It's important to note that regardless of what methods drivers attempt to use to evade section speed cameras - such as changing lanes or trying to delay time - these methods are largely ineffective. The best approach is simply to avoid speeding altogether by maintaining a steady speed in compliance with regulations, avoiding sudden acceleration or deceleration, and not relying on last-minute braking. 2. Avoid sudden braking: In the past when only fixed-point speed measurement was used, drivers could rely on radar detectors or familiarity with the road to anticipate speed check points. They would often apply sudden braking when approaching a known speed trap to temporarily reduce their speed. However, with section speed measurement, this tactic of sudden braking at the last moment is no longer effective.
Last time I drove on the highway, I encountered an average speed check. This type of speed measurement calculates your average speed by dividing the distance between two fixed points by the time it takes you to pass through that section. For example, on an 80 km/h limited 20-kilometer stretch, the required time must not be less than 15 minutes. Cameras at both the start and end points record license plates and times, and the system automatically calculates the average speed. Exceeding the speed limit by even 1 km/h is considered a violation. Some drivers think speeding in the middle section is fine, but they end up being fined when the end point camera shows they arrived too early. I recommend paying attention to the starting point sign when driving, using map navigation to track the remaining distance, and maintaining a steady speed for safety. Overtaking is fine, but keep it brief. For long-distance trips, it's best to monitor your speed throughout, as national highways often have these speed check points.
As a driver with over a decade of experience, I believe average speed measurement is fairer than instantaneous speed detection. It uses two cameras at the start and end points of designated highway sections to precisely record your entry and exit times. The distance divided by time calculates your average speed - exceeding the speed limit for that section constitutes a violation. Many overlook three key points: first, missing the start point photo means lost timing data; second, thinking speeding mid-section won't be penalized; third, slowing down before the endpoint is ineffective as the system calculates overall average speed. Driving on Yunnan-Guizhou-Sichuan highways, I've found long downhill sections most prone to violations. I recommend using cruise control to maintain steady speeds.
