Tackling stationary engine idling

Reducing emissions from road transport is one of the most effective ways we can improve air quality. Avoiding idling, whenever possible, can help make a positive difference. 

It is an offence to leave your engine running, and you could receive a fine for doing so. Rule 123 of the Highway Code says that drivers must apply the parking brake and switch off the engine when their vehicle is stationary on a public road.

Reasons to avoid idling 

• It creates air and noise pollution which is harmful to public health.
• It contributes to a range of problems including heart and lung diseases.
• Children, young people and people with existing health conditions are particularly vulnerable. 

How you can help

When your vehicle is parked for more than a couple of minutes, please remember to switch off your engine. We recognise, however, that there may be occasions when you may need to idle your engine:

• When diagnosing an engine fault
• When stationary due to traffic conditions
• When de-icing and de-misting windows for safety before making a journey

Examples of unacceptable reasons for idling:

• Waiting to pick up or drop off passengers
• Charging a phone or listening to music
• Operating heating/cooling systems for comfort

What we’re doing

Many people are not aware that stationary idling is an offence. We are working to address this by raising awareness and encouraging drivers to switch off, when stationary. We will develop a national campaign and seek opportunities to support local anti-idling initiatives.

We have also consulted on new regulations to replace the current £20 fixed penalty fine with a higher penalty range. This will reflect the serious consequences of air pollution which idling contributes to.