MD 528 and MD 378 continue north to 9th Street, which is one-way westbound and designated MD 378B. MD 528 becomes two-way at 9th Street. MD 378 continues north as a two-lane street northbound to 15th Street, where the state highway turns west to reach its northern terminus at MD 528. Baltimore Avenue continues north of 15th Street as a two-way municipal street to its northern end at 33rd Street. MD 528 continues north from 9th Street as a divided highway with two lanes northbound and three lanes southbound. The state highway gains a third lane northbound at MD 378 (15th Street). At 17th Street, MD 528 assumes its form for the remainder of its course to the Delaware state line: three lanes in each direction plus a continuous combined right turn, bus, and bicycle lane in both directions. The road heads into the Midtown section of Ocean City, which is home to numerous restaurants and nightlife, at 28th Street. After passing the Jolly Roger Amusement Park at 30th Street, MD 528 meets 33rd Street, which is one-way westbound coming from the northern end of Baltimore Avenue. North of 33rd Street, MD 528 becomes Coastal Highway, the only through highway on the barrier island that is lined with numerous hotels and businesses. The state highway passes the Roland E. Powell Convention Center at 40th Street and intersects the eastern terminus of MD 90 (Ocean City Expressway) at 62nd Street. MD 528 continues through commercial areas and heads into North Ocean City at 91st Street, where it passes numerous condos along with the Gold Coast Mall at 112th Street. Farther north, the route runs past more businesses and hotels, heading east of the 144th Street Transit Center before it reaches the Delaware state line at 146th Street, two blocks east of the Fenwick Island Light. Coastal Highway continues into Fenwick Island as DE 1, which meets the eastern terminus of DE 54 one block north of the state line. Throughout Ocean City, MD 528 serves as the divider between the Bayside area to the west and the Oceanside area to the east. As the main north-south road in Ocean City, MD 528 experiences heavy traffic in the summer months as the resort town sees a large number of visitors and seasonal residents. The route also provides access to hurricane evacuation routes leading out of Ocean City, including US 50, MD 90, and DE 54.