5.6 million 15.6 million 560 000 1.56 million
Interstate 95 Interstate 70 Interstate 68 Interstate 83
Annapolis Gaithesburg Salisbury Baltimore
Mason-Dixon Line Transpeninsular Line 49th Parallel Tropic of Cancer
Centennial State Bay State Old Line State Peach State
New York Chicago Boston Washington DC
Cape Cod Bay Herring Bay San Pablo Bay Chesapeake Bay
Susquehanna River Putuxent River Potomac River Patapso River