The Congress for New Urbanism philosophy is as follows:
Making Connections a Priority
Through grids of streets, transportation choices, and the siting of buildings along sidewalks, New Urbanism brings destinations within reach and allows for frequent encounters between citizens, in sharp contrast to sprawl (right). A key measure of connectivity is how accessible communities are to people with a range of physical abilities and financial resources.
Professional Land Surveyor Source: Congress for New Urbanism
I don't want to give it away, but I bet you've either designed or laid-out one of these before. Watch the video and comment on what you think about it.