How much can you exceed the speed limit in highway section speed measurement?

[DelHazel]

Highway section speed measurement allows exceeding the speed limit by less than 10% without penalty. Below is an introduction to fines and penalty points for speeding by ordinary vehicles on highways: Speeding less than 10%: No penalty for now. Speeding 10%-20%: A fine of 50 yuan and 3 penalty points. Speeding 20%-30%: A fine of 50 yuan and 6 penalty points. Speeding 30%-50%: A fine of 200 yuan and 6 penalty points. Speeding 50%-70%: A fine of 1000 yuan and 12 penalty points, with possible driver's license revocation. Speeding more than 70%: A fine of 2000 yuan and 12 penalty points, with possible driver's license revocation.

[SanCatherine]

I've been driving on highways for over a decade, and you really can't take chances with average speed cameras. Simply put, this system uses cameras at both ends of a road section to calculate your average speed over that distance. If the speed limit is 120 km/h and your average speed reaches 130 km/h, you're definitely speeding. Some people think they can briefly accelerate when overtaking, but the overall average speed must never exceed the limit. Since the speedometer typically shows 3%-5% slower than actual speed, I recommend keeping your speed at about 95% of the limit to stay safe. Just last month, a buddy got fined for doing 125 km/h on G60 because his average speed was 2 km/h over. In rainy conditions with slippery roads and longer braking distances, speeding is even riskier. Safety comes first—leaving earlier is always better than speeding.

[OElla]

As a long-haul truck driver, I can tell you that the biggest fear with average speed check zones is exceeding the speed limit. My experience is to keep an eye on the real-time average speed displayed on the car navigation throughout the journey. On a road with a 100 km/h speed limit, you should ease off the accelerator when the navigation shows an average speed of 98 km/h. Don't believe those rumors about being able to exceed the limit by 10%—Zhejiang penalized cases of just 3% over the limit last year. Truck drivers need to be even more cautious; with heavy loads, the braking distance is longer, and speeding increases the risk of accidents. In tunnels, where lighting changes dramatically, it's easy to lose control of your speed—it's best to use cruise control and stay 5 km/h below the limit. Actually, maintaining a steady average speed is much more fuel-efficient than constantly flooring the accelerator.

[MacRonan]

When I first got my driver's license, I didn't understand the severity of average speed control until I got a ticket on the Shanghai-Kunming Expressway. The core of this system is calculating average speed. On a road with a 120 km/h limit, if you drive at 130 km/h for three minutes and then at 110 km/h for another three minutes, your average speed is still 120 km/h. But if you speed up to 140 km/h in the first half, you'd have to slow down to 100 km/h in the second half to average out, which is practically difficult to manage. The speedometer usually shows about 5% lower than the actual speed, so the speed limit alerts from navigation systems are more accurate. I recommend turning on lane-keeping assist—it helps avoid speeding and makes driving easier. The most unbelievable case I've seen was someone getting caught at 118 km/h just because their average speed exceeded the limit by 1.2 km/h over the entire stretch.

[McAngela]

A friend was handling a speeding violation at the traffic police station and has seen too many cases of average speed enforcement. There's simply no room for speeding because the system automatically calculates the average speed between two points. Even if you exceed the limit momentarily, as long as the overall average doesn't exceed, it's not considered a violation. However, trying to compensate for speeding by slowing down in the latter half is basically futile—if you exceed by 30 km/h in the first segment, you'd have to drive more than 20 km/h below the limit in the latter segment. The new regulations require speed measurement errors not to exceed 3%, meaning driving at 123 km/h in a 120 km/h zone could get you ticketed. Mountain highways have many curves, and sudden deceleration can be dangerous. Installing a radar detector with average speed alerts is the most practical solution, as it gives you a three-kilometer heads-up on maintaining the average speed.

[DelChristopher]

During my last road trip, I studied the principle of speed measurement. The average speed control system calculates the time taken to pass through a section by recognizing license plates. The key is maintaining the average speed: for example, on a 50-kilometer stretch with a 120 km/h limit, completing it in 25 minutes is just within the limit. If you speed up to 130 km/h and finish in 24 minutes, you exceed the limit by 4%. Different vehicle types have varying errors—my SUV shows 122 km/h while the actual speed is 127 km/h. The safest approach is to set the cruise control to 8 km/h below the speed limit. Pay special attention to downhill sections where it’s easy to overspeed; shift to a lower gear in advance. Experienced drivers adjust their speed 500 meters before the speed measurement starting point. Actually, driving at the prescribed speed only adds about ten minutes to a 300-kilometer journey, while doubling the safety factor.