In 2006, Lasseter spoke about the inspiration for the film, saying: "I have always loved cars. In one vein, I have Disney blood, and in the other, there's motor oil. The notion of combining these two great passions in my life—cars and animation—was irresistible. When Joe (Ranft) and I first started talking about this film in 1998, we knew we wanted to do something with cars as characters. Around that same time, we watched a documentary called 'Divided Highways,' which dealt with the interstate highway and how it affected the small towns along the way. We were so moved by it and began thinking about what it must have been like in these small towns that got bypassed. That's when we started really researching Route 66, but we still hadn't quite figured out what the story for the film was going to be. I used to travel that highway with my family as a child when we visited our family in St. Louis."