What should a driver do when driving through a tunnel?

When driving through a tunnel, it is important to turn on your headlights and remove your sunglasses. Tunnels typically have variable lighting conditions, and sometimes they can be much darker than the road outside. Turning on your headlights ensures that your vehicle is visible to others and enhances your own visibility in less lit areas. Removing sunglasses can help improve your ability to see clearly in the changing light conditions, as they can obscure your vision in darker environments.

Ensuring that your headlights are on allows other drivers to see you, contributing to overall safety in potentially confined spaces. This is especially true since tunnels may limit visibility and create areas of shadow where it can be harder for drivers to detect one another.