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