Switch puzzle

[NW Mailing List]

MY guess a subway system. Brad Clauser



-----Original Message-----
From: NW Mailing List <nw-mailing-list at nwhs.org>
To: 3N&W Mailing List <nw-mailing-list at nwhs.org>
Sent: Sun, Mar 3, 2013 2:02 pm
Subject: Switch puzzle



 
This image has appeared repeatedly in a switch manufacturer's ad in various railroad trade journals.  It appears to offer three different routes through it.  Can anyone explain where such a switch would be used?
 
Gordon Hamilton

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