Most of the modern housing estates around Chippenham seem to be a warren of small cul-de-sac’s, but that’s just modern developments really. Monkton Park is one huge cul-de-sac, but it has the big advantage of having the London-Bristol line right at the entrance to the estate, plus the Sustrans Route 43 goes either side of it. Pewsham estate has most of the smaller roads feeding out onto feeder roads that connect with Pewsham Way, so there should be few issues there, really. One advantage that should be considered is that the cul-de-sacs generally don’t suffer from through foot traffic from pubs and such like, so there’s less noise and vandalism, and they’re a better environment for kids as there’s much less vehicle traffic as well.