The move toward “mobility as a service” took a step forward last week when Lyft expanded a pilot program, for people who agree not to drive a private car, to dozens of cities. The “Ditch Your Car Challenge” program, initially offered just in Chicago but now in 35 additional cities, offers to provide credits for Lyft, transit, bike share, scooter share, and car share modes. The modes vary by city, but the credits are substantial in all of them. Fifty to 100 participants will be selected in each city.