Why is the speed limit on Wushen Expressway set at 80km/h?

[VonLouis]

The primary reason for the 80km/h speed limit on Wushen Expressway is that the Hunan section passes through many mountainous areas with complex road conditions and numerous tunnels. Below is relevant information about expressway speed limits: Speed limits in special sections: Areas such as tunnel entrances, inside tunnels, accident-prone sections, large bridges, roads under maintenance, temporary speed limit zones, and long downhill sections all have speed limit signs. Drivers must pay attention to roadside speed limit indicators and drive cautiously. Penalties for speeding: Speeding within 10% of the limit results in a warning. Speeding between 10%-20% incurs a 3-point deduction; speeding between 20%-50% incurs a 6-point deduction; and speeding over 50% incurs a 12-point deduction, along with varying fines for each offense.