Route 3 is a bus route operated by the Maryland Transit Administration in Baltimore and its suburbs. The line currently runs from the Inner Harbor with most trips operating to Cromwell Bridge Road Park and Ride (at exit 29 off the Baltimore Beltway) in Baynesville along the corridors of Loch Raven Boulevard and St. Paul Street, with selected trips to Sheppard Pratt Hospital in Towson, mostly via Joppa Road, and some trips making short turns at Loch Raven and Taylor. It is the successor to the 17 St. Paul Street streetcar line that ran from 1893 to 1938 and the Route T bus that ran from 1939 to 1947.