A CT friend emailed these (you can readily tell in what sorts of directions his interests lie):
Danbury Railway Museum
Connecticut Antique Machinery Association
The Shore Line Trolley Museum
and, if your travels happen to take you near Coalbrookdale, England,
Ironbridge, Birthplace of Industry.
Photo: An old trolley at the Trolley Museum. I remember how the old trolley tracks could twist your bike tires when you rode over them as the tracks were gradually consumed by layers of asphalt. The bus lobby beat out whatever trolley lobbies there were and roads, unlike tracks, were built and maintained by government. A shame.
Photo below: Cylinder of a Corliss Steam Engine at the Machinery Museum