How to Use Lights Before Entering a Two-Way Traffic Tunnel?

2 Answers
GriffinLee
08/30/25 6:10am
When entering a two-way traffic tunnel, vehicles should generally turn on the low beam headlights and avoid using the high beams. If the tunnel itself is unlit, drivers may switch between lights, but must switch back to low beams when approaching an oncoming vehicle. Here are some guidelines for driving through tunnels: 1. When passing through a typical single-lane tunnel, first observe whether there are oncoming vehicles, then turn on the front and rear lights of the vehicle. In general, honking should be avoided. The purpose of turning on the lights is to indicate the vehicle's position, maintain a safe distance, and prevent rear-end collisions. 2. When driving in a dual-lane tunnel, adhere to traffic rules by keeping to the right. Lane changes within the tunnel are prohibited, and overtaking should never be attempted inside the tunnel. 3. Due to the relatively narrow roads inside tunnels, especially with the shoulder width at its minimum basic width, stopping arbitrarily in the tunnel is strictly prohibited to avoid traffic congestion. If a vehicle breaks down inside the tunnel, a safety warning sign must be placed at the tunnel entrance, and efforts should be made to tow the vehicle out of the tunnel. Repairs should not be conducted inside the tunnel to prevent safety hazards.
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EmmaAnn
09/12/25 3:16am
As a veteran driver who frequently takes long-distance trips, I think this issue is particularly important. Before entering a bidirectional tunnel, be sure to turn on your low beams 50 to 100 meters before the entrance. I've driven through mountain tunnels several times, and the drastic change in light intensity inside and outside the tunnel is significant. Entering without lights is like driving blind, making it easy to hit obstacles or be misjudged by oncoming vehicles. Using low beams makes your car visible in the dark without affecting other drivers. Remember not to use high beams, as they can dazzle oncoming drivers and increase danger. Additionally, tunnel entrances often have signs reminding you to turn on your lights—developing this habit can prevent accidents. Checking that your lights are functioning properly and maintaining your bulbs regularly is crucial. In rainy or foggy conditions, turning on your lights in advance doubles your safety. In short, this small detail can mean the difference between life and death—better safe than sorry.
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