John Rowland:
Was there any device to prevent broad gauge trains attempting to go the
wrong way?

Clive Feather:
No broad gauge rail. The track would be something like this:

\ \ \
\ \ C\
\ \ \\------------
\ \ \--C
-------X-------\--------------
\
\
\
------------------------------
A

Irrespective of the setting of the points, the check rail C would
pull a broad-gauge axle around the curve.

Well, it would try to, but wouldn't the point at A try equally hard
to put the wheel on the wrong side of the rail? Or is there something
special about the bit of track on that side too?
--
Mark Brader "People with whole brains, however, dispute
Toronto this claim, and are generally more articulate
in expressing their views." -- Gary Larson