This is Not a Test (1962)

The cop was really a jackass. Late at night on a two lane road in the desert, a deputy gets a message. He blocks the road. Barks orders at the drivers he stops. There may be a nuclear attack. He thinks the trailer of a truck will serve as a fallout shelter.

I saw this movie in the middle of the night when I was thirteen or fourteen. I thought the cop was an idiot for smashing all the bottles of liquor. You'd think it might be useful medically after the apocalypse.

The film is public domain. I watched it on Pub-D-Hub although it's available elsewhere including YouTube. You could do a remake, one where they kill the cop so they can die in peace.

72 minutes.