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Is it allowed to overtake a slow-moving vehicle in a tunnel?

2 Answers

DiKeira

07/25/25 5:57am

Overtaking is not allowed in tunnels. Due to the inherently narrow space inside tunnels, overtaking poses significant risks. During the initial design phase of tunnels, construction authorities established regulations prohibiting arbitrary lane changes and overtaking based on factors such as tunnel curvature, depth, and vehicle traffic standards. Currently, similar regulations are implemented in tunnels nationwide. Reduce speed and turn on lights before entering the tunnel: When driving during the day, the sudden dimming of light upon entering a tunnel can cause temporary visual impairment as human eyes take time to adjust. Therefore, approximately 100 meters before entering the tunnel, drivers should reduce speed, increase following distance, and activate headlights to safely enter the tunnel at a relatively slower speed. Maintain a sufficiently safe following distance: The drastic difference in light levels when entering or exiting a tunnel can cause momentary blindness, leading many drivers to instinctively brake. Additionally, following vehicles may also experience this temporary blindness. Thus, maintaining a greater following distance is essential to ensure adequate safety.

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StJeffrey

08/10/25 5:58pm

I think it's best not to overtake when the car in front is too slow in a tunnel because the space is narrow, the light changes drastically, and visibility is low, making collisions more likely during overtaking. Once, I was in a highway tunnel, and the car in front was moving very slowly. I thought about speeding past it but almost collided with an oncoming car, which scared me into a cold sweat. Overtaking in a tunnel is not only dangerous but may also violate traffic rules, and the fine isn't cheap. I suggest being patient, maintaining a safe distance, and waiting until you're out of the tunnel. If you're really in a hurry, you can flash your lights to remind the car ahead to speed up, but don't take risks. Safety first—it's better to drive a bit slower than to get into an accident.

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