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withdrawn - until then the new ''distance to go signalling'' system is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