What are the techniques for reversing a semi-trailer in a straight line without deviation?

[DelMatteo]

The techniques for reversing a semi-trailer in a straight line without deviation are: 1. The principle of reversing is 'the direction the steering wheel is turned, the rear of the vehicle will move in that direction.' When adjusting the vehicle's position, for example, if you notice the left side of the vehicle is too far from the edge line, you can turn the steering wheel to the left to narrow this distance; 2. The principle of steering adjustment is 'turn as much as you return, turn quickly and return quickly, turn slowly and return slowly.' For instance, if you turn the steering wheel 90 degrees to the left to adjust the vehicle's position, you should return the steering wheel 90 degrees to the right when the desired effect is about to be achieved. A semi-trailer is a trailer where the axle is placed behind the vehicle's center of gravity (when the vehicle is evenly loaded) and is equipped with a coupling device that transmits horizontal and vertical forces to the tractor. Semi-trailers are generally three-axle trailers, and their types include 11-meter box semi-trailers, 13-meter box semi-trailers, low-bed semi-trailers, and other varieties.