In message , Nick Pedley
writes
Go back and look closer at the pictures, especially the one of the suspended
monorail car with two open-air seats facing each direction of the square
tunnel:
http://www.clouse.org/images/senate01.jpg
As I remember it, it was open the same, but just two seats and operated
between the White House and a station. It was just the one car in a
square section tunnel.
--
Clive.