Route 31 is a bus route operated by the Maryland Transit Administration in Baltimore and its suburbs. The line currently runs from State Center Metro Station S east through downtown Baltimore to CCBC Dundalk. The main roads on which the line operates are MLK Boulevard, Pratt Street, Lombard Street, and Boston Street. The line serves the communities of Canton, Fells Point. The bus route is the successor to the 11 Canton, 20 CCBC Dundalk,