What should you do if there are red flashing lights above a single lane on the motorway?

Answer: B — Move into another lane as soon as it is safe to do so

When red flashing lights are present above a single lane on the motorway, it indicates that that lane is closed to traffic. The appropriate action is to move into another lane as soon as it is safe to do so. This response ensures the safety of both the driver and other road users, as flashing red lights are a clear signal to avoid using that lane. Using the lane marked by red flashing lights would violate the instructions given by the traffic management system and could lead to hazardous situations. Similarly, stopping in that lane or speeding up to clear it would create further risks, potentially causing congestion or accidents. Therefore, moving into another lane promptly ensures compliance with road regulations and supports the overall safety on the motorway.