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On Apr 2, 11:16 am, rail wrote:
Very sophisticated for the time; remember, practical ICs were a decade or more in the future. And the line had - and still has - mechanical interlockings. The Westinghouse V-frame interlockings stay on the line through the VUL program until all 2009 stock is delivered and all 1967 stock is withdrawn - until then the new ''distance to go signalling'' system is overlaid on top of the existing wayside equipment to allow 1967 and 2009 stock co-running. Planned date 2011. -- Nick |
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