In 1947 the New Haven RR installed a mechanized IBM car forwarding and processing system that used teletype technology. The railroad was apparently very proud of their new system and published a small booklet about it. I found a copy and scanned because it’s an interesting look of how technologies changed business operations and the evolution toward data processing and technologies. It’s also a good look at how the railroads conducted their business in the transition era. It seems that the motive power transition was not the only one happening on the rails, just one of the most visible.
I’ve included the booklet in it’s entirety to show both how the system operated both before and after the new system was installed. Here’s a link to more about the system from IBM.
From the sounds of it, not very many other railroads installed this system in the late 1940’s. But then the New Haven had to be forward thinking.