Here in Western MA, a few of the smaller cities will have bike lanes, basically a wide marked shoulder big enough for one bike. We also have a network of MUPs built on old railroad beds. As far as I know they are built and maintained by private organizations. The one near me is OK for a fat tire jaunt but I can't ride it on my road bike. There's too many holes, frost heaves, and tree roots poking up, too much traffic, and someone decided to used recycled glass in the pavement. You can see the shards sticking up and glistening in the sunlight. State roads that have been resurfaced in the last decade generally have been widened with 3' shoulders and aren't too bad to ride on.