What applies on clearways for motor vehicles only?

On clearways for motor vehicles, certain rules are designed to ensure safety and traffic flow. There are two key points to remember:

1. No U-turns are allowed on clearways because such maneuvers can disrupt the flow of traffic and create hazardous situations.
2. Vehicles must join the clearway only at crossroads and junctions. This rule is in place to prevent sudden stops or merges that could lead to accidents, especially since clearways are meant for uninterrupted traffic.

The third option regarding driving faster than the range of visibility allowed by dipped headlights is incorrect and violates safety regulations. It's crucial for drivers to see well within their range of visibility, especially in darkness.

Thus, selecting both the first two points is vital as they work together to maintain a safe and efficient driving environment on clearways.