Martin's Crosswinds Greenbelt, MD 20770 (301) 474-8500 From I-95 & I-495 combined section of the Capitol Beltway, take Exit 22 North, Baltimore-Washington Parkway (295). Take an immediate exit onto Greenbelt Road East. Turn right on Hanover Parkway. Take the next right onto Greenway Center Drive. Martin's Crosswinds is located at the end of Greenway Center Drive.