TripRank
School Zone Speed Cameras: Rules, Hours, and Penalties
School zone speed cameras are common for safety, operating specific hours with varied penalties, from civil fines to automatic double charges.
Guides
Speed, cameras and the rules behind them
Written to answer one question properly. Every number here — a tolerance, a fine, a regulation — links to the source it came from, and anything we could not source is not published. See the editorial policy.
6 guides
Speed cameras
How camera enforcement works, where it is legal, and what the thresholds really are.
2 guidesSpeed & accuracy
Why indicated speed and true speed differ, and what the regulations actually require.
0 guidesDriving data
Trip telemetry, G-force and what the numbers from a drive actually mean.
Tyre Size and Your Speedometer Accuracy
Changing your tyre's diameter alters its rolling circumference, directly affecting your speedometer's accuracy and potentially leading to significant speed discrepancies.
Radar, Lidar, ANPR: The Tech Behind UK Speed Cameras
Speed cameras use radar, lidar, or ANPR to measure your speed; radar uses radio waves, lidar uses light pulses, and ANPR calculates average speed over distance.
Speed Camera Tolerances: What Drivers Face Globally
Drivers face varying speed camera enforcement thresholds and margins of error across countries, from strict no-tolerance policies to allowances based on percentages or fixed values.
UK speed camera tolerance: what 10% + 2 mph actually means
The 10% + 2 mph threshold is real, it is confirmed in police disclosures, and it is not a legal entitlement. Here is what the guidance says, who sets it, and why it can change without notice.
Where speed cameras are legal in the United States
Nineteen states and DC permit automated speed enforcement, ten prohibit it outright, and twenty-one have no law at all. What that patchwork means for a driver crossing state lines.
Why your speedometer reads high, and why GPS doesn't
Car speedometers are legally required to over-read. UN Regulation No 39 sets the exact allowance — up to 10% plus 4 km/h — and explains the gap between your dashboard and a GPS speed app.
How Average Speed Cameras Work
Average speed cameras use ANPR to time vehicles between two points, calculating speed over a distance to deter continuous speeding.