If I took the Adventure Cycling route from my home here in Florida to my brother's place just north of New York City it would be about 1850 miles. The shortest highway route is about 1150 miles. When I bicycle tour I cover about 1450 miles.
I stick a lot closer to the coast than the AC route except for South Carolina. 17 and 17A have horrendous, shoulderless high-traffic stretches south of Summerville and Charleston.
I also go up the Outer Banks of NC with its numerous delightful ferry rides. You can get across the Chesapeake Bridge-Tunnel by going into the toll booth offices and simply asking for a ride across. They will grumble a bit if you don't call ahead but you will get a free ride across in a maintenance pickup.
I also take the huge Lewes DE-Cape May NJ ferry and shoot straight up US9. It's a fine bicycling road except for an unavoidable 2 1/2 mile stretch of Garden State Parkway shoulder near New Gretna. I have done this a couple of times, hammering hard. The cops ignored me.
To get into NYC you can take the ferry from Atlantic Highlands or the train from South Amboy. The ferry is much more pleasant albeit a lot slower.
I really like bicycling in New York City. The drivers are the best in the world. I've never gotten any hostility and it is certainly interesting. For the Manhattan Greenway map go to:
http://www.nyc.gov/html/edc/pdf/greenway_mapside.pdfAlong the Connecticut/Rhode Island coast you will have bridges closed to cyclists at Newport RI and, probably, New Haven CT.
Generally, I find coastal bicycling much more scenic and pleasant than inland despite the hassles. There are also a lot more facilities
This message was edited by litespeed on 9-23-08 @ 2:34 PM