How is the average speed over a distance calculated?
2 Answers
The calculation method for average speed over a distance: When entering a speed monitoring section, cameras capture an image, recording the vehicle's entry time. Upon exiting the section, another photo is taken. The system calculates the vehicle's travel duration between these two points, then divides the section's total distance by this time to determine the average speed. To avoid speeding violations, maintain a consistent speed throughout the monitored section without exceeding the posted limit. Navigation systems typically alert drivers to upcoming speed-monitored zones; adhere to speed limits when encountering such sections.
When driving long distances on highways, I often encounter average speed checks, which simply measure your average speed over a fixed distance. There's an entry camera at the start that captures your license plate and records your entry time, and an exit camera at the end records your exit time. The system calculates the time difference. The distance is fixed—for example, 10 km with a speed limit of 120 km/h. If you complete it in less than 5 minutes, you’ve exceeded the limit. Last time, I wasn’t paying attention on a mountainous highway and drove too fast, ending up with a speeding ticket. My advice is to check the warning signs before entering the zone, slow down in advance, and maintain a steady speed. Don’t speed at the start and brake hard at the end to trick the cameras—it’s crucial for safe driving and saves you money too.
