J Mays is a well known car designer that has worked with several real world companies in the past. He also designed cars for the movie Zootopia as a consultant for Disney.
J Mays originally came into contact with Disney in 2005, while guiding employees through the Ford Design Studios. It was here that he originally made acquaintance with Pixar's head creative, John Lasseter. The two sparked an immediate friendship during the tour at Ford.
Having originally helped during the production of Cars, he had gone on to continue involvement with several other movies, including Big Hero 6. Following this, John Lasseter approached him to design cars for the then upcoming Zootopia project.
Mays agreed, and was given the story and a police line-up of various animals he would have to make vehicles for, with Lasseter wanting a realistically plausible form of transportation for each one.