MattC, I hate hate HATE road structures like that. It's so easy to conflate "avenue" with "street".
What's even worse is when a town has a setup like that, but "Main St." and "Main Ave" bisect at the center of it all: there's a 1st St. North and a 1st St. South, and the same for Ave. I'm not sure why it's so confusing for me, but living in a town like that it took me a good couple months to not get easily disoriented while driving around after dark. (The fact that the "Ave", "St", "N", and "S" were printed quite small on the road signs may have had something to do with it.)