The system of the present invention preferably comprises a set of wayside occupancy detectors, an output device, a memory and a processing unit. Each wayside occupancy detector preferably generates a set of transport detection signals in response to detecting a set of mobile transports. The output...http://www.google.com.au/patents/US5836529?utm_source=gb-gplus-sharePatent US5836529 - Object based railroad transportation network management system and method
