It recently occurred to me that anthropomorphized cartoon automobiles can be separated into two distinct groups. The first group consists mostly of convertible or open-top vehicles with eyes formed by the headlamps:
Benny the Cab from Who Framed Roger Rabbit?
A second distinct group consists of characters with enclosed passenger compartments and eyes that magically appear as part of the vehicle’s windshield. For obvious reasons, this type of vehicle never seems to carry either passengers or a driver:
Defendant in “The Story of Anyburg, USA”
Lightning McQueen in Cars