Which sections of urban roads are prohibited from overtaking when driving a motor vehicle?

[FranciscoFitz]

When driving a motor vehicle through sections of urban roads with heavy traffic flow, overtaking is not allowed. The specific situations where overtaking is prohibited are as follows: 1. When the vehicle ahead is making a left turn, turning around, or overtaking. 2. When there is a possibility of meeting an oncoming vehicle. 3. When the vehicle ahead is a police car, fire truck, ambulance, or engineering rescue vehicle performing emergency tasks, overtaking is not allowed, and the right of way should be yielded to ensure their emergency passage. 4. When passing through railway crossings, intersections, narrow bridges, curves, steep slopes, tunnels, pedestrian crossings, or sections of urban roads with heavy traffic flow where overtaking conditions are not met.