Clearly the process of tracing the low-resolution Yahoo! imagery is not complete, not to mention the high-resolution areas. (OT: Stay tuned for a map of the proposed widening and interchanges on 17 between [55] and 69, in the OSM tradition of mapping stuff before it's constructed :\)¹ )

¹ Not sure on the best way to escape the smiley. Xkcd² recently had a comic about this but did not propose a definite solution.
² HEY EVERYONE IM DISREGARDING XKCD'S SPELLING GUIDELINES !!!!!!111!!1!11!!11!1!1!!1nineeleven