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Signals II

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Subject: Signals II
From: "Karl L Rethwisch" <karlre@r...>
Date: Tue, 25 Apr 2000 06:47:21 -0600
The 1947 rear ender at Naperville is an example of how and why signals needed 
to be, and were, re-aligned. Traffic density and train speed play a critical 
role in signal spacing. Also, adding a greater number of signal INDICATIONS 
(the operational requirements conveyed by the ASPECT [color, solid, flashing, 
multiple colors, etc.] of the signal) provided higher levels of safe train 
movements.

Of course, the single, GREATEST safety feature of a signal system is COMPLIANCE 
with the indications.

Karl


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