What applies on clearways for motor vehicles only?

The selected combination is correct because, on clearways designated for motor vehicles only, specific rules apply to ensure safe and efficient traffic flow.

1. No U-turns is important because U-turns can cause sudden stops and obstructions, leading to potential accidents.
2. Joining the clearway only at crossroads and junctions ensures that vehicles enter the road safely without disrupting the flow of traffic.

The third option, regarding driving faster than the range of visibility allowed by dipped headlights in darkness, is incorrect because it contradicts traffic safety regulations. In Germany, drivers must always be able to stop within the distance that they can see ahead, which is crucial for ensuring safety on roads, especially in darkness.

Understanding and adhering to these rules helps maintain a safe driving environment on clearways.