What should you do if your engine starts making strange noises while driving in a tunnel?

If your engine starts making strange noises while driving in a tunnel, the best course of action is to try to drive out of the tunnel. This is crucial for your safety and the safety of other road users. Driving out of the tunnel allows you to reach a location where you can safely address the issue, seek assistance, or assess the situation without being confined in a potentially dangerous environment. Tunnels can pose risks such as reduced visibility and limited space, making it more challenging to handle emergencies effectively.

In the context of the other options, stopping in the emergency lane may not be advisable since it can obstruct vehicles and pose hazards, especially in a tunnel where space is limited. Turning off your headlights is also not a safe choice, as it reduces visibility and could endanger yourself and others. Exiting the vehicle immediately can expose you to risks such as oncoming traffic, especially if you have not moved to a safer location first. Therefore, driving out of the tunnel when experiencing engine issues is the most sensible and safe action to take.