What should you do when driving in a tunnel?

Answer: B — Turn on your headlights and reduce your speed

When driving in a tunnel, it is essential to turn on your headlights and reduce your speed. This practice enhances visibility within the tunnel, which can often be darker than the surrounding areas, ensuring that you can see clearly and that others can see you. Reducing your speed is critical because tunnels can create unique driving conditions, such as narrower lanes, possible obstacles, or changes in traffic patterns. Turning on your headlights ensures that you are visible in low-light conditions, minimizing the risk of accidents. Many tunnels have regulations mandating the use of headlights regardless of how much natural light is available, highlighting the importance of this safety measure. The combination of reduced speed and proper lighting while driving through a tunnel significantly contributes to staying safe and maintaining awareness of other road users.