Does Adhesion Decrease in Tunnels?
1 Answers
Adhesion does decrease when driving in tunnels. Here are some relevant tips for tunnel driving: 1. Maintain a safe following distance: Keeping a safe distance and leaving enough space for evasive maneuvers ensures sufficient safety. Generally, a following distance of over 100 meters should be maintained in tunnels. For longer tunnels, follow the posted guidance to maintain an appropriate safe driving distance. 2. Avoid using high beams: Prolonged use of high beams at night can affect oncoming and preceding vehicles, as they can cause temporary blindness to drivers. The significant difference in light levels inside and outside tunnels already makes it difficult for drivers to adjust visually. Adding high beams to this situation increases the risk of accidents, so high beams should be avoided. 3. Reduce speed and turn on low beams before entering the tunnel: During daytime driving, entering a tunnel causes an instant drop in light levels, which can make it hard for the human eye to adjust quickly. Therefore, about 100 meters before entering the tunnel, you should reduce speed, increase following distance, and turn on your headlights to enter the tunnel safely at a relatively slower speed. Generally, speed should not exceed 60 km/h, but you can adjust based on the speed limit signs posted before the tunnel.
