In article , Peter Corser
writes
AFAIR the white aspect came up on the corner signal as soon as a 270 code
(medium speed, but allowed remotoring) was available to the train in the
platform. The green was a genuine LUL green - only allowed once the
preceding train had cleared an "overlap" on the next signal

No. From memory the signal shows white when the line is clear to the
next headway post plus overlap and green when it is clear to the next
signal plus overlap. A station starting point would only produce a 420
code, not a 270 - 270 allows restarting at a signal stop but not from a
station. White would only be displayed with a 420 code.

The codes were 420
pulses per minute = full speed allowed, 270 + medium speed with motoring,
180 = medium speed coasting only, 0 = only used by signalling system.

120, not 0.

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Clive D.W. Feather | Home:
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