You are on a narrow road at night, and a slower vehicle ahead is signaling right. What should you do?

In this situation, the appropriate action is to wait for the slower vehicle's right signal to be cancelled before attempting to overtake. This is crucial for ensuring safety on the road. The indication that the vehicle is signaling to turn right means that it may be preparing to make a turn or change direction, which could lead to a sudden stop or maneuver.

Overtaking without first confirming that the vehicle will not turn can create a dangerous situation, especially on a narrow road where space is limited. Patience is vital in this scenario; by waiting until the signal is no longer active, you ensure that you can safely pass without inadvertently causing an accident or collision.

The other options present risky behaviors that could compromise safety. Overtaking immediately or sounding your horn could lead to misunderstandings or provoke an unsafe reaction from the driver ahead. Changing lanes without confirming the intention of the vehicle in front can also lead to dangerous situations, particularly in limited visibility conditions such as at night. It's always best to prioritize caution and clarity in such driving scenarios.