Sic Semper Skybus
Skybus, IMHO, is the Rosetta Stone of Pittsburgh's public transit history. If you want to read more on where I get that, read what must be the definitive history: SKYBUS Pittsburgh's Failed Industry Targeting Strategy of the 1960s. by Morton Coleman, the late David Houston and Ted Muller.
The last real vestige of Skybus as public transit (as compared to people movers you see around) is the Personal Rapid Transit (PRT) in use on the campus of WVU in Morgantown. There was some talk of some PRT-like transit system being built for Oakland and environs, but that talk seems to have all faded without any notice by anyone. Made for a good PR at one time I guess.
But I am just catching the most complete Skybus video now on Youtube is a must watch: