Internal and external traffic lights are a good product to complete the safety of the loading dock. It is recommended to provide the loading dock not only with a wheel chock but also with a traffic lights system. The PBEA traffic lights systems assure communication between the vehicle driver and the warehouse staff. They show the driver when the loading dock can be approached and left safely. The traffic lights are connected to the PROMStahl control unit and adjustments/programming can be adapted to suit your individual requirements.