Heavy Traffic represents a follow-up to animator Ralph Bakshi's first feature film, Fritz the Cat (1972). The central character is Michael, the ingenuous son of an Italian father and Jewish mother. An aspiring cartoonist, Michael leaves home in a huff and outrages his family by conducting an affair with an African-American woman. Heavy Traffic was originally intended to be a cartoon adaptation of Hubert Selby's notorious novel Last Exit to Brooklyn, but negotiations fell through, and Bakshi was obliged to cook up a similar but not identical "mean streets" plotline. (Last Exit to Brooklyn was made as a live-action film in 1989.)