Sacramento Bee: Here’s one key to Daniel Sperling’s vision for the future of mobility: He doesn’t like to drive. It’s not so much that Sperling, one of the nation’s most influential transportation thinkers and policymakers, hates sitting behind the wheel (though he does prefer riding as a passenger). It’s more that he finds the petroleum-powered, single-occupant vehicle a little, well, uninspiring. His new book, “Two Billion Cars: Driving Toward Sustainability,” is a plan for how we can do …