Why are there dashed lines in tunnels?

1 Answers
DeBlakely
07/29/25 11:48pm
The dashed lines in tunnels are not actual dashed lines; they are diamond-shaped deceleration guide markers on both sides of solid lines, and lane changing is not allowed. Below is an introduction to the requirements and precautions for driving in tunnels. Requirements for driving in tunnels: Because tunnels have fewer lanes and relatively poor visibility, it is essential to slow down in advance before entering, clearly observe the internal conditions of the tunnel, and maintain an appropriate distance from the vehicle ahead at the prescribed speed. Based on road conditions and traffic needs, roads are divided into motor vehicle lanes, non-motor vehicle lanes, and pedestrian lanes, with motor vehicles, non-motor vehicles, and pedestrians traveling in their respective lanes. Precautions for driving in tunnels: Illegal lane changing is prohibited. While dashed lines allow lane changing, it must be done in accordance with the law by fulfilling the obligation to observe and ensuring safety. Changing lanes over solid lines constitutes illegal lane changing. Follow the vehicle ahead in sequence within the tunnel and avoid changing lanes to overtake.
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