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Abstract
Each year fatalities are caused by larger equipment running over smaller equipment and personnel. Between 1984 and 2002 there were seven fatal incidents in the USA that could have directly been prevented with the use of a proximity system with transmission lock implemented on the mobile equipment involved in each incident. These incidents resulted in the loss of lives, equipment and production time. The proximity warning and transmission locking mechanism system described here involves the development of software and hardware placed in haul trucks, service vehicles and other large mobile equipment. With the implementation of a proximity warning system (in this case based on GPS) and a transmission locking mechanism, lives could be saved and non-fatal accidents could be prevented.