Which urban roads prohibit overtaking when driving a motor vehicle?

[DeZoey]

Driving a motor vehicle on urban roads with heavy traffic flow prohibits overtaking. Specific situations where overtaking is not allowed include: 1. When the vehicle ahead is making a left turn, performing a U-turn, or overtaking. 2. When there is a possibility of encountering oncoming traffic. 3. When the vehicle ahead is an emergency vehicle such as a police car, fire truck, ambulance, or engineering rescue vehicle performing urgent duties—overtaking is prohibited, and you should yield the right of way to ensure their emergency passage. 4. When passing through areas with conditions unsuitable for overtaking, such as railway crossings, intersections, narrow bridges, curves, steep slopes, tunnels, pedestrian crossings, or urban roads with heavy traffic flow.