It's a Mad, Mad, Mad, Mad World

Several different motorists witness a single car crash in the California desert and, after the driver's dying words indicate the location of a hidden stash of loot, turn against each other in a mad dash across the state to get to it.

It's a Mad, Mad, Mad, Mad World is a 1963 adventure crime movie directed by Stanley Kramer, starring Spencer Tracy, Milton Berle, Mickey Rooney. It holds an IMDb rating of 7.5/10 from 51,223 votes and runs 3h 30m.