Overview
- The Welsh Government implemented the higher fixed-penalty range on Wednesday, Sept 30, 2026, replacing the previous £20 fine with a £75–£150 band for unnecessary engine idling.
- Enforcement rules require an officer to first ask a driver to switch off their engine and only issue a penalty if the driver refuses or continues to idle.
- The offence covers petrol, diesel and hybrid vehicles under section 42 of the Road Traffic Act 1988, while electric vehicles are not targeted because they produce no exhaust when stationary.
- Official guidance lists exemptions where idling is not an offence, including when stopped in traffic, when powering essential equipment, for vehicle diagnostics or repairs, and when the vehicle is on private land.
- Local authorities can choose a specific fine within the new range and will pair enforcement with public outreach such as school visits and signage to raise awareness and change driver habits.