I rode from East Providence to Boston and back today (Saturday). Most of 138 is very good, most of 152 is pretty good. There are a few places on 126 that have so many potholes and patches on top of patches that you almost have to stop. Keep your eyes open all the time if you have 700x23 tires. Lots of nice scenery.
It was about 43 miles to the Milton town line and about 47 to the Boston town line.
I took some pix of the ride.
http://pg.photos.yahoo.com/ph/dad029...D8L2CBZVmHGvKU