The broken pay phone at the Arizona gas station displays an 801 area code, which is located in north-central Utah.
Some shots have Peggy with painted nails; some shots have Peggy with bare nails.
When Jack asks Mitch to get off the bus, Mitch's line "Why should I?" clearly does not match his mouth (he in fact says "go to hell").
Camera helicopter reflected in the side of the bus during the final chase scene.
The envelope displaying Jack Glover's address in Arizona has the Zip code 12121, which is located in Melrose, New York.