Roadkill Bill is a comic strip

Comic strip

A comic strip is a sequence of drawings arranged in interrelated panels to display brief humor or form a narrative, often serialized, with text in balloons and captions....

 created by Ken Avidor.
The cartoon has an anti-car theme and frequently advocates the theories of Ivan Illich

Ivan Illich

Ivan Illich was an Austrian philosopher, Roman Catholic priest, and "maverick social critic" of the institutions of contemporary western culture and their effects on the provenance and practice of education, medicine, work, energy use, transportation, and economic development.- Personal life...

The main character, Roadkill Bill, is a squirrel with distinctive tire tracks across his torso and tail.

The cartoon ran weekly for nearly four years in the Twin Cities alternative newspaper, Pulse of the Twin Cities and has been published in book form by Carbusters Magazine, proponents of the car-free movement

Car-free movement

The car-free movement is a broad, informal, emergent network of individuals and organizations including social activists, urban planners and others brought together by a shared belief that cars are too dominant in most modern cities...

, as well as Funny Times.