It's a Mad Mad Mad Mad World (1963)

A group of motorists witnesses a car crash in the California desert, and after the driver's dying words indicate the location of a hidden stash of loot, they turn against each in a race across the state to get to it.

Director: Stanley Kramer

Cast: Spencer Tracy, Milton Berle, Ethel Merman, Mickey Rooney, Sid Caesar, Buddy Hackett, Dick Shawn, Phil Silvers, Terry-Thomas, Jonathan Winters, Edie Adams, Dorothy Provine, Eddie 'Rochester' Anderson, Jim Backus, Ben Blue, Joe E. Brown, Alan Carney, Chick Chandler