I thought this was a Twilight Zone or Outer Limits, but after reviewiing the lists of episodes, it doesn't appear to be. I remember it as black and white.
Could you be remembering the Twilight Zone episode Stopover in a quiet town? Involved a couple and it was a train not a car but the idea is the same. Only one train out of town (Centerville) and it brought you right back to Centerville. Episode is from Season 5 and is available for streaming from Netflix.
This is almost certainly The Prisoner.
It's a British spy series, where in the backstory a secret agent that quits under tense circumstances is kidnapped and taken to a strange town which acts as a prison of sorts, and subjected to bizarre and violent behavior. In his many escapes, he's chased by what looks to be a giant beach ball.