The Pearl River Valley Water Supply District (The area of the suburb I live in around the Barnett Rez) "maintains" our mup with a small street sweeper during the week. If I come across broken glass they havn't got to yet, then I'll stop and slide it out to the edge with my foot. About 2/3 of it are perfect with some awesome little bridges and what have you but the last third really needs to be repaved.
Litter is handled by the convicts every week also so it stays pretty nice.