I just saw a documentary on Henry Ford last night. At its maximum the famous Ford River Rouge plant had a capacity to build 10,000 cars a day! They also had armed guards patrolling the plant and would beat up and then fire workers who gathered together to talk (to prevent them from organizing into unions). This was after the early days of Ford and their Model T (not S) when Henry Ford paid the best wages. When I lived near Fremont in the '70's I would drive by the GM plant (which is now where Telsa is) and it would take some time to pass it on the freeway. Not as big as River Rouge, but still pretty big.