Inom bilens logik fungerar bussar som mobila skyltar, samt ger guidade turer i London.
I love the detail in our films. I believe God is in the details. We put so much detail into this film. The more you look, the more you’ll see of car parts, car shapes. Every sign, every street name, everything… Every ad on the sides or on the buses or things like this are all unique to the car world and unique to whatever country you’re in. - John Lasseter
Och både bussar och taxibilar skulle kunna leda bilar till sina önskade destinationer mot en liten avgift.
No one knows the sites, streets or shortcuts of London better than the jovial Chauncy Fares, a quintessential London black cab. - Pixar Wiki