On heavy machinery and vehicles, the operating and maintenance staff are exposed to high potential hazards. To protect the operating staff, the driver seats of e.g. farming vehicles or road building machinery are equipped with safety switches as deadman's control. Alternatively, footswitches must be actively operated to acknowledge the correct presence of the operator.
Potential hazards for the maintenance staff are also concealed behind the service and maintenancedoors of heavy machinery or vehicles. Here, actively operated enabling switches or safety mats can provide relief - or solenoid interlocks, which keep the doors closed until the hazardous movement has stopped.