Tunnel dashed lines do not allow lane changes. Inside the tunnel, you should follow the vehicle in front in sequence and avoid changing lanes or overtaking. Because tunnels have fewer lanes and relatively poor visibility, you should slow down in advance before entering the tunnel, observe the internal conditions clearly, and maintain an appropriate distance from the vehicle in front at the prescribed speed. Below are some related tips for driving in tunnels: Maintain a safe distance: Keeping a safe following distance and leaving enough space for avoidance is essential for safety. Generally, the distance between vehicles in a tunnel should be more than 100 meters. If the tunnel is relatively long, follow the corresponding safety distance as indicated. Do not use high beams: Using high beams for extended periods at night can affect oncoming traffic and the vehicle ahead, as high beams can temporarily blind drivers. Inside the tunnel, the difference in light levels between the inside and outside already makes it difficult for drivers to adjust visually. Adding high beams can increase the risk of danger, so avoid using them. Slow down and turn on low beams before entering the tunnel: When driving during the day, entering the tunnel causes an instant dimming of light, which can make it hard for the eyes to adjust quickly. Therefore, about 100 meters before entering the tunnel, you should reduce speed, increase the distance from the vehicle ahead, and turn on your headlights to enter the tunnel safely at a relatively slower speed. Generally, the speed should not exceed 60 km/h, but you can adjust based on the speed limit signs before the tunnel.
