You have broken down on a motorway and managed to stop safely on the hard shoulder. You are waiting for recovery and it is a cold day. How should you manage your engine while you are stationary to comply with the Highway Code and minimise environmental impact?

Explanation

Highway Code Rule 123 states you MUST NOT leave a parked vehicle unattended with the engine running or leave the engine running unnecessarily while stationary on a public road. On the motorway hard shoulder you should treat the vehicle as parked: apply the parking brake and switch off the engine to reduce emissions and noise pollution. It is only permissible to keep the engine running if stationary in traffic or for diagnosing faults. If you need heat briefly while waiting for recovery, you may restart the engine for a short time, then switch it off again.