Last summer I rode across the north of Pennsylvania, following U.S. 6 for a good portion of the ride. You can see my route journaled here:http://www.crazyguyonabike.com/doc/myUSAtour2007
I used sanoodi.com to record all my routes for GPS, so you can see the routes themselves. Sorry, but I didn't take a lot of pictures.
I took a route further south than the ACA route because I had people to visit.
I was glad that the highway was marked regularly as a bike route. I had very little trouble in Pennsylvania with angry drivers and dogs. Even though little has been done to modify the highway, just the fact that it was marked at regular intervals as a state bike route made me feel more comfortable there. In general, the shoulder on U.S. 6 is wide. Occasionally, in a town, there would be short stretches without a shoulder.
The climb over the eastern continental divide was good exercise, but the grade was gentle.
Even though it was the middle of the summer, and I was on a state bike route, I didn't see a single touring cyclist besides myself in northern Pennsylvania, and this was in June too. By comparison, when I was briefly on the ACA's Northern Tier route in northern Ohio, I met many cyclists.
The so-called bike routes marked on the Pennsylvania highway map are a mixed bag. The rail trail that was supposed to exist coming into Hancock, New York, turned out to be more of a snowmobile trail. I used the road instead. http://www.sanoodi.com/route/metzenberg/52429/chicago-to-new-york-trip-june-28-2007/
I don't feel like this route was really a great bike route. It was a way to cross the USA, but lacked the great rides and great scenery of the west. In western Pennsylvania, there is much more logging than in New York State or New England. It just doesn't feel like a high quality forest. I understand that houses are made of wood, that people need jobs, and so forth. That's my opinion. I think the ACA route is a better route, and certainly an easier one. Have a good trip.
This message was edited by metzenberg on 5-21-08 @ 1:22 AM