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