Automatic ramp. The driver must be a control device. The system needs to work when the car stops. And sound or flashing lights in the display as the system is working.
Auto ramp-driving people to control the device by the system to work when a car parked there and stop the audio signal or flashing lights showing on the system running khonthi.
The slope, the driver must be an automatic control device operating system must be running when the car stopped and the light blinks or sound signal is shown in the system is in operation at B