LadyinWhite:
I believe it is 9 that crosses the Bear Mt. Bridge and goes up to Cold Spring. It was the 2 lane road closest to the Hudson. The traffic wasn't too bad... the drivers behaved themselves. I was riding in a group of about 15 riders so it wasn't really scarey.

lizbids:
The traffic on most of the roads I used didn't go above 35 or 40 mph. They go faster on 9W (45-50 mph) but there are very wide shoulders for most of 9W. Route 9 has skinny or no shoulders. You should have basic skills for riding with all kinds of traffic if you're going to ride on any road.
I ride on these kinds of roads all the time. I hate "in the city" traffic. That's what really scares me. I learned by riding with the NYCC and participating in their Spring training series. Highly recommended.

Carol