Graeme wrote:
In message
,
Matty F writes

It's a tramline. There are 8 lines going to trambarns, and each needs
the points to be changed when the trams are put away each day.

A Youtube film showing simple points operation :

http://www.youtube.com/watch?v=unhXEQQk8G8

Probably best not copy their overhead catenary, though :-)

That was amazing. Thank you. I loved the bit where it looked as if he was
making and breaking contact on the catenary so that it sounded more like a
steam engine!