The interior of Harris Tower
The electro-pneumatic levers control switches and signals
The model board lights up as computer-simulated trains move through the plant
Plenty of trains to see still
Amtrak's eastbound Pennsylvanian pulls in
Eastbound Pennsylvanian and the Harrosburg trainshed
More than 100 levers
Each lever is numbered and corresponds to a specific switch or signal
Communication station and model board
Train sheet shows the many passenger trains that had to be switched at Harrisburg each night
Closeup of the model board
Paperwork - there was lots of paperwork!
Middle of the board
Tags were placed on out-of-service levers
Harris Tower, Oct. 20, 2012
Indicator lights display status of switches
Under the hood - the mechanical interlocking apparatus
Dwarf in the corner
Even the teletype machine is set up to print train information
Block occupation lights
