Historical color video of major USA event shows presence of UFO

This week I saw a color video on TV of the opening day of the Pennsylvania Turnpike. I think that was in 1960 or earlier.  Up in the sky over one of the cloverleafs was a shiny metallic object much like a blimp but it had no gondola and at one tip was a circular area of air turbulence. I had heard from someone in college back in 1966 that a UFO had hovered over the PA turnpike on its opening day. The PA turnpike was a big event for the people of the region and the UFO  presence a few hundred feet up made it all the more noteworthy.
Date is approximate.  We believe the Pennsylvania Turnpike was operational at least as early as the late 1950's, although it may have been formally dedicated at a later date.  I travelled over it enroute from the Midwest to NYC in 1958, and perhaps even earlier.  PD