In the early days of computers and railroads, the national railroad system voted to install a bar code on every piece of equipment. Every few miles the would run through a trackside scanner that allowed "instant updates" about the car and it's speed - location - direction of travel etc. If a shipper called the railroads "FREIGHT CAR TRACING DEPARTMENT" and wanted an update on his carload, the railroad just entered in the data... "WHERE IS"? Rock Island 49320, within seconds a message would sprout from the machine - Northbound, 4 miles South of Green Cove Springs Florida at 0405AM EST 01-05-75. Of course by 1975 the 1504 sat in the middle of the Seaboard Coast Line Parking lot in downtown Jacksonville...sort of like an oversize garden gnome.
So I was up in the SCL (CSX TODAY) building and a friend tells me, "Bob, you gotta see this..." off we go to car tracing. He enters in the search "WHERE IS?": ACL 1504. At first the screen went off, then came back and flashed on and off a few times. Then in giant letters it scrolled past us "LOOK OUT THE WINDOW STUPID!"
I never learned who did this little trick or if they still have a modern version of the same. The car bar code system was ended after a federal mandate and many - many millions of $$ that the railroads coulldn't afford (at the time). Seem's no one thought that when grease, mud, cement, grime, dirt, clays, oils or spray paint got on the label, it couldn't be read. DUMB! A 3 year old could have figured that out but not the FRA. Todays version has RFID built in, so you don't need to see the car for it to talk to you.
OCKLAWAHA