Ride-Sharing Services Grow Popular in Europe

PARIS — On a recent Friday evening, Vincent Accart maneuvered his 20-year-old Mercedes station wagon through the rush-hour traffic to a rendezvous at a busy fuel station on the edge of Paris. There he met three strangers who hopped into his car for a three-and-a-half-hour drive to Rennes, in Brittany. It had all been arranged beforehand, via the Web.