UK: Network Rail to implement Trial Modular Signalling System by Westinghouse Rail Systems August 12, 2009 | Europe News UK rail operator, Network Rail, will implement a modular signalling system on its Crewe-Shrewsbury pilot line in 2010. The system has been developed by Westinghouse Rail Systems, a subsidiary of Inven... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password