Audi's night vision assistant, an example of how car companies are making cars that are part of drivers' digital lives. Courtesy of Audi hide caption

itoggle caption Courtesy of Audi

Zach Brown's preferred mode of transportation is his skateboard. Brown, 27, is an artist and actor who doesn't own a car. Courtesy of Zach Brown hide caption

itoggle caption Courtesy of Zach Brown

Classic cars of all makes and models drive the 16-mile stretch along Woodward Avenue during the annual Dream Cruise in 2009 in Ferndale, Mich. During the annual event, the glory days of car culture return, if only for a day. Jerry S. Mendoza/AP hide caption

itoggle caption Jerry S. Mendoza/AP

Teenagers turn to their phones and social media to find rides. Tanggineka Hall/Youth Radio hide caption

itoggle caption Tanggineka Hall/Youth Radio

To teens today, cars aren't important in the same way they were in American Graffiti, the 1973 film directed by George Lucas. Lucasfilm/Coppola Co/Universal hide caption

itoggle caption Lucasfilm/Coppola Co/Universal