Cul de Sacs are a familiar feature of suburbia. They are also coming under increasing attack, according to TNR:
So, for instance, one study of the city of Charlotte found that places where the streets weren’t very well connected (thanks, in part, to the heavy use of cul-de-sac) required a lot more fire stations to be built, costing the area more money. Another study found that areas with poor connectivity have much worse congestion—up to 80 percent worse—because the main roads and arteries are more likely to get clogged. So it’s not just that cul-de-sac layouts dissuade people from walking or biking; they also seem to be imposing costs on local governments. Though it’s unclear whether this backlash is a growing trend or just a few isolated incidents.
For a more detailed discussion, look here. And in the meantime, avoid those suburban dead ends!