The Omega Man (1971)

Other mistake: Early in the movie, when Neville wrecks his car he takes the gas can out of his car and starts walking down the street. As he does they switch to a wide view of the city in which you see about three city blocks. When you look at the only "through" street in the shot, there is a car making a left hand turn about three blocks down that street and just behind the car is the freeway overpass with two or three cars passing on it, before the shot ends.

Neville: You know the old song? If you were the only girl in the world, and I was the only boy, well, okay, but until then, don't bother me? Well, I guess I'm the only boy.