Here’s a pretty map of Chicago, produced by Erin Davis:
(Click for a larger image)
The colours come from the street suffixes: Green for ‘roads’, yellow for ‘streets’, etc. It’s an interesting commentary on naming trends and the historical development of the city.
Erin’s done many more, too, which you can find on her site here, and more recently including more global cities, here.
There clearly haven’t been many new ‘streets’ in London for some time…