Options like Uber, Lyft, Zipcar, and bikesharing have some people stepping out of their cars and turning to alternative modes of transportation. Do these new options mean we've reached peak car use in cities? Transportation guru and Start-Up City author Gabe Klein weighs in on National Public Radio's "Here and Now." Hear what the former DOT director of Washington, DC and Chicago and former Zipcar executive has to say about which cities are leading in transportation innovation, what a decline in car use means for equality, and more.