Question to the Department for Transport:

To ask the Secretary of State for Transport, whether he has made an assessment of the potential merits of increasing signage at level-crossings to help tackle vehicle idling.

The Department has made no such assessment. Drivers are required to learn the Highway Code and rule 123 relates to unnecessary engine running. The rule states:

"You MUST NOT leave a parked vehicle unattended with the engine running or leave a vehicle engine running unnecessarily while that vehicle is stationary on a public road. Generally, if the vehicle is stationary and is likely to remain so for more than a couple of minutes, you should apply the parking brake and switch off the engine to reduce emissions and noise pollution. However, it is permissible to leave the engine running if the vehicle is stationary in traffic or for diagnosing faults.”