MD 173 continues north into Riviera Beach. At its intersection with Riviera Drive and Bar Harbor Road, the state highway turns west and crosses Stony Creek on a drawbridge. In Orchard Beach, MD 173 intersects the western end of its old alignment, MD 642 (Greenland Beach Road), then expands to a four-lane road with a center left-turn lane. Passing Cox Creek, the state highway becomes a four-lane divided highway and passes the Herbert A. Wagner Generating Station and the adjacent Brandon Shores Generating Station. MD 173 turns north at Solley Road and passes Marley Neck Boulevard before entering the city of Baltimore. Upon entering the Hawkins Point area, the state highway meets Fort Armistead Road, which leads to Fort Armistead Park and an entrance ramp to eastbound I-695 (Baltimore Beltway). MD 173 turns west and its name changes to Hawkins Point Road before the highway intersects Quarantine Road, which leads to a three-quarter diamond interchange with I-695.