Aberdeen Proving Ground
MD 715 begins at a modified trumpet interchange with US 40 (Philadelphia Boulevard). The state highway heads east from US 40 as a six-lane divided highway that intersects Old Philadelphia Road and the entrance to an industrial park. MD 715 crosses Amtrak's Northeast Corridor and MARC's Penn Line and passes north of the Visitor Center of Aberdeen Proving Ground as it reaches its eastern terminus at an entrance to Aberdeen Proving Ground. This gate is open 24 hours daily and allows entry for persons with a Government ID along with visitors without a Government ID. All visitors to the Aberdeen Area of Aberdeen Proving Ground must use this gate to enter. Past the gate, the road continues into the Aberdeen Proving Ground as Maryland Boulevard.