a due northerly course near Memorial Park and continues along the Southgate–Wyandotte city line. This area is mainly residential neighborhoods that extend in street grids on either side of the Fort Street boulevard, including the Old Homestead neighborhood of Southgate. The highway crosses the South Branch of the Ecorse River and enters the city of Lincoln Park, through which Fort Street angles slightly northeasterly before turning sharply to the northeast at Champaign Road. M-85's new direction keeps it parallel to the Detroit River about away. When the trunkline crosses the North Branch of the Ecorse River, M-85 enters the city of Detroit near Outer Drive. Fort Street runs parallel to I-75 through the Boynton–Oakwood Heights neighborhoods of the city. North of the intersection with Schaefer Highway, M-85 meets an interchange with I-75 and passes under the freeway, crossing to its northwest side. At this interchange, the LECT designation is transferred from M-85 to I-75. Fort Street continues running between an industrial area and I-75. In this area, the highway crosses the River Rouge and turns east-northeast. Fort Street continues through the Delray neighborhood and past Woodmere Cemetery before crossing under I-75 again; there is no interchange at this location. These two highways continue in parallel to the north of Fort Wayne and the Detroit Harbor Terminals / Boblo Island Detroit Dock Building; M-85 intersects Grand Boulevard and passes under the approaches for the Ambassador Bridge; I-75 turns inland near the bridge's toll plaza north of Fort Street. M-85 continues along the river into the Corktown neighborhood. As M-85 approaches downtown, it crosses over the Canadian Pacific-owned Michigan Central Railway Tunnel. Several blocks later, the highway passes over M-10 (Lodge Freeway) without an interchange near Huntington Place. Fort Street continues carrying the M-85 designation as far east as the intersection with Griswold Street, one block west of Campus Martius Park. M-85 is maintained by the Michigan Department of Transportation (MDOT) like other state highways in Michigan. As a part of these maintenance responsibilities, the department tracks the volume of traffic that uses the roadways under its jurisdiction. These volumes are expressed using a metric called annual average daily traffic, which is a statistical calculation of the average daily number of vehicles on a segment of roadway. MDOT's surveys in 2010 showed that the highest traffic levels along M-85 were the 42,786 vehicles daily in Wyandotte; the lowest count was 5,976 vehicles