Timmy uses his electric wheelchair as a transportation service for the townsfolk of South Park. The business is really a fundraising operation for the handicapped summer camp at Lake Tardicaca. The Handi Car uses a smartphone app for pick-up and delivery anytime of day or night. The wheelchair is connected to Lil' Zipper red wagon. The wagon has a small table, two chairs, and a candle for romantic travel.
Handi Car was in competition with other vehicles in the return of Wacky Races.
A similar transportation vehicle was utilized in the video game The Stick of Truth. It was called the Timmy Express, although this name was never mentioned in the "Handicar" episode.