Is America’s love affair with the automobile cooling?

A study out this month by the University of Michigan’s Transportation Research Institute finds that a larger share of U.S. households do not own a car, light truck or SUV. In 2012, 9.22% of all U.S. households were without a vehicle, little changed from 9.29% in 2011 but continuing an uptrend started since 2007, just before the economy fell into recession.