C�ras Iompair �ireann is king of the road (and rail) in Ireland. The company, known as the CI� Group, operates the Dublin Bus, Bus �tha Cliath, and Bus �ireann units as well as the Iarnr�d �ireann passenger and freight rail system. Most of the CI� Group's revenue comes from its road passenger operations. Other operations include tourism, property sales, food service, and outdoor advertising sales. The company's CIE Tours International bus tour company primarily does business in North America. The CI� Group is wholly owned by the government of Ireland.