Proximity warning system (PWS) functions are integrated into the locomotive control unit (LCU) of an end of train (EOT) communication system. The PWS operation provides increased information to train crews relating to the location and movement of other trains in the area. The PWS functions are ...http://www.google.com/patents/US5757291?utm_source=gb-gplus-sharePatent US5757291 - Integrated proximity warning system and end of train communication system
