How to distinguish the (L/R) fixed positions of parking lot gates?

Parking lot gates are a crucial component of parking fee collection systems. A common question when choosing a gate is whether to select a left-fixed or right-fixed gate. This must be clearly discussed beforehand; otherwise, it may render the gate unusable.

Designate the side of the gate box that is open as the front. When a person is facing the front of the gate box, if the gate box is to the right of the barrier, it is a right-fixed gate; if it is to the left, it is a left-fixed gate.