Old Colony Ave. at Dorchester St. rebuilding crosswalk Old Colony Ave. at Dorchester St., Columbia Rear of Wellesley Park, D.R.T. Dorchester - Columbus Ave. Storehouse, George St. yard Dorchester Tunnel Dorchester Tunnel Dorchester Tunnel Dorchester Tunnel Dorchester Tunnel Dorchester Tunnel Beyond Ashmont Station near Van Winkle St. Codman Sq. car and bus stop Codman Sq. car and bus stop Dorchester, Codman Sq. Codman Sq., car and bus stop Ashmont Station Beale St. and Mattapan loops condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Bridge on Gallivan Boulevard, Codman Sq. Yards Ashmont Station at parking area and bus loop Columbia Station Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Ashmont Station condition of concrete Columbia Station overpass to parking area Columbia Station overpass to parking area Columbia Station overpass to parking area Columbia Station overpass to parking area Columbia Station billboards Savin Hill overpass - condition of concrete Savin Hill overpass - condition of concrete Savin Hill overpass, condition of concrete Savin Hill overpass - condition of concrete, station platform Savin Hill overpass - condition of concrete Savin Hill overpass - Dorchester Rt. - condition of concrete Savin Hill overpass - condition of concrete Dorchester Rt. condition of concrete between Columbia and Tunnel D.R.T. concrete condition of cemetary wall, Cedar Grove D.R.T. concrete condition of wall at Milton Branch Overpass