Great Britain Theory Test Coach
Documents and the lawQuestion 374 of 424

When may you leave the engine running while the vehicle is stationary on a public road?

  1. When you leave the vehicle to go shopping
  2. When you are stationary in traffic
  3. When you wait for a friend for ten minutes
  4. When you listen to the radio at the kerb
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Correct answer: When you are stationary in traffic

Never walk away from your car with the engine running. You may leave it running when you are stopped in traffic.

Source: The Highway Code (Department for Transport, GOV.UK), General rules, techniques and advice for all drivers and riders (103 to 158), Rule 123

Practice documents and the law

Questions last reviewed: 18 October 2026