What does 'back' mean in a car?

[GenesisFitz]

The 'back' of a car refers to the act of making a U-turn, which is the operation of changing the direction of the car by 180 degrees under road conditions where U-turns are permitted. Sometimes, U-turns are also required in non-road conditions such as parking lots, and the method is basically the same. Car U-turns must strictly comply with relevant regulations: vehicles are not allowed to make U-turns at railway crossings, pedestrian crossings, curves, narrow roads, bridges, steep slopes, ramps, or sections of the road where danger is likely to occur. Precautions for car U-turns: based on road conditions or traffic conditions, try to choose a safe section of the road where U-turns are allowed, with fewer vehicles and without obstructing normal traffic flow and pedestrians. Choose to make a U-turn at a dashed line; U-turns are not allowed at solid lines.