Part of Michael's backstory was that he served in the Vietnam War. At the time, this was one of the few TV series whose protagonist was a Vietnam Veteran, and one portrayed in a positive manner.
Michael Knight, a lone crusader in a dangerous world. The world... of the Knight Rider.
In almost every episode the landscape seen through the car-windows when Michael is talking to KITT while cruising doesn't match the exterior views of KITT driving along.