Ridesharing wasn't a thing 12 years ago when John Zimmer was in college. But a class on green cities got him thinking about the glut of underused cars on the road, and eventually led him to co-found Lyft, a company that has helped make ridesharing a way of life. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.