What lights should be turned on before entering a tunnel?
2 Answers
Before entering a tunnel, you should turn on the contour lights and low beam headlights. Before entering a tunnel, not only should you slow down and turn on the lights in advance, but you should also pay attention to the traffic signs in front of the tunnel, especially the speed limit signs. Once inside the tunnel, you must not overtake, exceed the speed limit, stop, or make a U-turn, and you should maintain an appropriate following distance. Contour lights are indicators installed on vehicles to show the width of the car and are commonly used lights. Low beam headlights are designed for close-range illumination, with a wide coverage range (160 degrees) and a short illumination distance, and the focus cannot be adjusted. When driving at night without street lights, poor lighting, or in low visibility conditions such as fog, rain, snow, dust, or hail, or when driving closely behind another vehicle in the same direction, low beam headlights should be used.
I think it's essential to turn on the low beams before entering a tunnel because the sudden darkness requires time for your eyes to adjust. Turning on the lights helps you see the road conditions clearly and makes it easier for others to notice you. With over 20 years of driving experience, I've encountered several instances where people entered tunnels without turning on their lights, almost leading to collisions or misjudged distances by vehicles behind. Low beams are the most suitable—don't use high beams, as they are too dazzling and can blind oncoming drivers, increasing the risk of accidents. Slowing down at the tunnel entrance is also crucial, giving the braking system some buffer time. In short, safety comes first—make it a habit to turn on the lights as soon as you approach a tunnel, benefiting both yourself and others.
