Which vehicles must always be marked by their own lights or parking warning plates when parked on the roadway at dusk or in darkness in built-up areas?

The correct combination of vehicles that must be marked by their own lights or parking warning plates at dusk or in darkness in built-up areas includes trucks and motor caravans with a permissible total mass exceeding 3.5 t, as well as trailers. This requirement is based on safety regulations aimed at ensuring visibility and preventing accidents.

Trucks and larger motor caravans are particularly difficult to see at night due to their size, and trailers can cause hazards when parked on the roadway. By marking these vehicles properly, other road users are alerted to their presence, which reduces the risk of collisions.

Cars, while still needing to be parked safely, do not have the same requirements for signage when parked at night in built-up areas because they are typically smaller and more maneuverable, making them less of a hazard in similar situations.

Understanding this distinction is crucial for road safety and compliance with German traffic laws.