Overview
- Regional outlets refreshed the warning on Monday after motoring experts said many drivers still wrongly believe smart-motorway cameras only work when variable limits appear.
- Gantry and average-speed systems record vehicle speed, time, location and registration and can issue penalties even when no reduced limit is displayed.
- There is no statutory ‘10% plus 2mph’ buffer, and police guidance that suggests discretionary margins does not create a legal allowance.
- When a limit changes the cameras run automatic self-checks and may flash, and authorities say a short activation delay is commonly allowed but no single national seconds figure is published.
- Drivers caught speeding face fines, penalty points or disqualification and may be offered an accredited speed-awareness course if they meet strict eligibility thresholds.