Position Light signalling

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 Lastly, I don't have an N&W rulebook from the 1940s-1959 so cannot comment 
 on whether N&W used "route" signaling somtime in the  1940s-1950s. In 
route signaling, aspects conveyed a route - not a speed. The  engineer was 
responsible for knowing the track area and the required speed.  Where a "speed" 
signal approach aspect rule might show "slow to medium speed",  the 
corresponding "route" aspect could indicate "prepare to take diverging  route."  This 
would be a good question for the list. 
  
   One aspect conspicuously missing from the rule book issued 1/1/1967 is  
still in use.  When an unsignalled track intervenes between the signal  and 
the track it governs, a low post on a bracket is mounted to identify  that 
track.  Originally, these posts were illuminated with one  light.  If more 
than one track intervened between the signal and the  track it governed, more 
posts were added.  Today, the post(s) remain, but  the light has been 
eliminated.  In SAL rule books, they're identified as  "doll  arms".               
                                             Harry Bundy. 

 
 
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