Sperling, Daniel and Mary Nichols (2012) California's Pioneering Transportation Strategy. Issues in Science and Technology Winter (2012), 59 - 66
No place in the world is more closely associated with the romance of the automobile and the tragedy of its side effects than California. Having faced the problem of traffic-damaged air quality, the state became a leader in policies to reduce auto emissions. Now that transportation is the source of 40% of the state’s contribution to climate change, California has become a pioneer in the quest to shrink its transportation footprint and a possible trailblazer for national policy.