When driving in a tunnel, what should you always do?

When driving in a tunnel, it is essential to turn on your headlights. This practice ensures that your vehicle is more visible to others in the tunnel, which may have reduced lighting conditions. Proper illumination helps both the driver to see the road and any potential obstacles or other vehicles, as well as allowing other drivers to see your vehicle clearly.

Maintaining visibility is crucial for safety, as tunnels can often create a distinct change in lighting compared to the outside environment. Drivers entering a tunnel may experience a temporary reduction in visibility, and having headlights on can mitigate this change, reducing the risk of accidents.

Turning off your headlights, driving at a reduced speed, or following other vehicles closely can lead to dangerous situations. For instance, turning off headlights would compromise visibility, while closely tailgating other cars can result in inadequate reaction time in case of sudden stops. Therefore, ensuring headlights are on is a fundamental safety measure when navigating through tunnels.