Disc jockey Super Soul (Cleavon Little) and delivery driver Kowalski (Barry Newman) are two of these specters, marginal but decent, intelligent men who can't or won't live in burgeoning competing cultures which in reality have offered them very little of worth or substance, despite their own personal sacrifices. Kowalski himself had tried to "fit in" with the Establishment as a soldier and police officer and later, attempted to do the same with the blossoming 1960s counterculture, but soon disappointingly found that they both were ridden with their own various forms of dishonesty and insincerity. Personal honor, self-reliance and genuine respect--Kowalski's stock in trade--were tragically valued very little by either, despite each one's shrill and haughty claims to the contrary.
Moreover, it's no accident Newman's character has a Polish surname; the Poles throughout their history have created a very rich and unique Slavic culture largely based upon just such a "marginality"--being geographically jammed between powerful historic enemies, Germany and Russia, and never being able to fully identify with either one, at often great cost to themselves. It's also no accident Little's character is blind and black, the only one of his kind in a small, all-Caucasian western desert town--his sightlessness enhancing his persuasiveness and his ability to read Kowalski's mind, the radio microphone his voice, his race being the focus of long simmering and later suddenly explosive disdain--all of the characteristics of a far-seeing prophet unjustly (but typically) dishonored in his own land.
The desert environment also plays a key role in cementing the personal relationship between and respective fates of these two men--to paraphrase British novelist J.G. Ballard, prophets throughout our history have emerged from deserts of some sort since deserts have, in a sense, exhausted their own futures (like Kowalski himself had already done) and thus are free of the concepts of time and existence as we have conventionally known them (as Super Soul instinctively knew, thus creating his own psychic link to the doomed driver.) Everything is somehow possible, and yet, somehow nothing is.
Finally, VP is also a "fin de siecle" story, a unique requiem for a quickly dying age- a now all-but-disappeared one of truly open roads, endless speed for the joy of speed's sake, of big, solid no-nonsense muscle cars, of taking radical chances, of living on the edge in a colorful world of endless possibility, seasoned with a large number and wide variety of all sorts of unusual characters, all of which had long made the USA a wonderful place--and sadly is no longer, having been supplanted by today's swarms of sadistic, military-weaponed cop-thugs, obsessive and intrusive safety freaks, soulless toll plazas, smug yuppie SUV drivers, tedious carbon-copy latte towns, and a childish craving for perfect, high-fuel-efficiency safety and security.
The just-issued DVD contains both the US and UK releases of the film; the UK release, I believe, is a much more satisfying film, as it has the original scenes deleted from the US version. As an aside, Super Soul's radio station call letters, KOW, are in fact the ones for a country & western station in San Diego.