The Charleston Area Regional Transportation Authority (CARTA) provides area residents and visitors public transportation within parts of Charleston and Dorchester counties in the Lowcountry region of South Carolina, including the cities of Charleston, North Charleston and the surrounding communities of Mount Pleasant, Summerville, James Island, Sullivan's Island, and the Isle of Palms. CARTA presently contracts with Transdev for staffing and managing the bus drivers in addition to maintaining and scheduling the buses. - Source: Wikipedia