The 60 Fords exceeded the maximum width allowed for passenger cars established by the DOT I believe. I think FoMoCo blew it by a couple of inches. Something to do with width limits on many old highway bridges in existence at the time before the great standardization imposed by the new Interstate System. The old rule was that any two cars had to be able to pass each other without touching while crossing the old bridges. The Fords were an inch or two too wide to pass without hitting each other. I think that's the story. Anyone else know this story. The mistake wasn't noticed until 60 Ford production was well under way which would have cost billions to correct at that point. The Feds gave Ford a pass on the issue. I don't know of any documented instances of two Fords side-swipping each other while passing in opposite directions on a bridge around late 1959 through 1961 or so when further construction of the interstate system rendered the issue moot. But who's to say it didn't happen only to be covered up by the government and J. Edgar Hoover and Lee Iacoca.