Today you would be zipping employees around in golf carts / ATVs etc.
I can't believe the restrooms were so limited on a plant that size....again, today it would probably have to meet different code. Sometimes, when you gotta go you gotta go....and a 1/2 mi walk may have been really inconvenient.
I was thinking the employees would have access to a used vehicle just for transportation to and from their particular station...but it seems you are saying that any driving on the site required a particular employee with the proper pay grade. Was that a union (if it was a union plant?) rule?