Road movie
I love, sometimes, to look at the various genres a particular film fits into, and then watch it multiple times, each time from the viewpoint of a different genre. This is a rewarding movie to view this way, and one of the surrising genres it fits is "road movie" Even if you've seen this before, I do recommend sometime watching it from this particular view, and even compare it with other road movies.
Captain Warren 'Rip' Murdock: I'm the brass-knuckles-in-the-teeth-to-dance-time type.