Wheel chocks are an alternative to increase safety near and on the loading and unloading bay. Wheel chocks are available in a variety of models.
They can be integrated with sensors, and can even be connected to Loading Systems CombiControl control boxes. If required, the dock door can only be opened after the wheel chock has been positioned in front of the wheel, after which the external traffic lights signal switch to red and the internal signal lights switch from red to green.