Your car has broken down in a live traffic lane on a busy dual carriageway. You have managed to stop safely on the left but cannot move the vehicle immediately. When should you use your hazard warning lights?

Explanation

According to Highway Code Rule 116, you may use hazard warning lights when your vehicle is stationary to warn that it is temporarily obstructing traffic. You must not use them while driving, except on a motorway or unrestricted dual carriageway to warn drivers behind of a hazard or obstruction ahead, and then only for long enough for the warning to be seen.