A resident has asked whether it is illegal to leave his diesel car idling on his driveway for 30 seconds before driving off, after a neighbour complained about the fumes.
Posting on Reddit, the motorist said he likes to let the engine run briefly to allow the oil and metal to acclimatise and avoid damaging the car. He said the neighbour 'ran over' after just 10 seconds and told him idling is illegal and the exhaust would go into their bedroom.
Highway Code rule on idling
People responding pointed to Rule 123 of the Highway Code, which says drivers must not leave an engine running unnecessarily while stationary on a public road. One commenter noted: "30 seconds doesn't seem unreasonable though, not many people get in their car, start it and drive off instantly."
The resident clarified that the car was not on a public road but on his own driveway. One person advised: "Just smile, nod and carry on with your life. People moan about anything."
Mechanical advice and RAC view
Another commenter said idling for 30 seconds to a minute does not prevent damage, adding that cars are supposed to be warmed up whilst driving and that drivers should set off within 10-15 seconds of starting the engine.
The RAC says idling instead of turning the engine off while stationary increases exhaust emissions, which contain harmful gases including carbon dioxide, nitrogen dioxide, carbon monoxide and hydrocarbons. Older diesel vehicles are thought to be among the biggest contributors due to high levels of nitrogen oxide and particulates.
Some local authorities charge a £20 fixed penalty notice for emission offences and stationary idling under The Road Traffic (Vehicle Emissions) (Fixed Penalty) (England) Regulations 2002, with the potential for the fine to increase to £801.
