Why is overtaking prohibited in tunnels?

[KarterLee]

Tunnels prohibit overtaking primarily due to poor ventilation inside tunnels. One of the main components of vehicle exhaust, lead, adheres to the road surface within the tunnel, making it slippery. If an emergency occurs while overtaking on such a surface, it can cause the vehicle to lose directional control, leading to a tailspin and resulting in a major traffic accident. 1. Reasons: Tunnels have narrow spaces, insufficient lighting, poor visibility, and enclosed spaces, making rescue difficult. In case of a fire, toxic gases cannot disperse. Accelerating while overtaking can easily lead to speeding. 2. Additional Information: Driving a motor vehicle without following overtaking or yielding regulations, or driving in the opposite direction, will result in a 3-point penalty. Overtaking is prohibited in busy sections, intersections, railway crossings, pedestrian crossings, sharp curves, narrow roads or bridges less than 4 meters wide, steep slopes, tunnels, or sections prone to danger.