Is it permitted to make a U-turn in a tunnel?
U-turns
In tunnels, changing the direction of travel is prohibited unless there is a sign that authorizes it, due to reduced visibility and the need to maintain safety and traffic flow.
Explanation
The **U-turn** in a tunnel is **prohibited**, unless there is a **sign that authorizes it**. This is because tunnels are places where visibility is limited, and performing maneuvers like a U-turn can be dangerous for road safety.
- In general, U-turns are prohibited in places where visibility is reduced, such as curves, hill crests, and also in tunnels.
- However, if there is a specific sign that allows a U-turn in a tunnel, then it would be permitted to perform it.
Therefore, the correct answer is that it is prohibited to change the direction of travel in a tunnel, unless a sign authorizes it.
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