[PRR-talk] track chart symbol question

[Steve Hanlon]

i am looking at some track charts from the final days of the PRR and can 
not find mention of a symbol on the key page of the charts.  the symbol 
is a vertical line through the main line track.  here is an example of 
the symbol circled in red;

http://asciibaron.dyndns.org/images/prrcharts.jpg

-steve