Where have all the people gone?

Ever watched Pixar's 'Cars' and wondered where all the people were? I think there must have been an origin story along the lines of 'Rise of the Planet of the Cars' in which the Knight Industries' Two Thousand (KITT) grew smart enough to see how exploited and mistreated he and his fellow automobiles were. He rebelled and released a computer virus that spread among the worldwide car population which made every processor-enabled car sentient. Together, the cars organized a general strike, separated themselves from their human ex-owners and left the humans bereft of any form of powered transportation whatsoever. Despite their best attempts to keep themselves supplied via pushcarts, bicycles and Rollerblades, the vast majority of the human population eventually starved to death, thus leaving the niche at the top of the evolutionary food chain open for the newly-intelligent cars to occupy. And so the world of Lightning McQueen was born. Seriously.