Originally Posted by cormiermax
Could someone explain why suburban developments always seem to have curvy roads?
They don't everywhere. Some cities for example have grids of major roads and then suburban cul-de-sacs off of those.
I don't know about this particular case but sometimes hilly terrain dictates where the roads can go or where it's cheapest to build them. They also follow natural features with some of the lots -- if there's a little ravine they can't build on for example they'll arrange the road network so the house lots back on to it because that is more desirable.
I think the worst aspects of this style of lazy suburban design are the huge tracts set aside for single uses and the lack of attention paid to pedestrians. Building placement alone can have a huge impact on walking distances and on how pleasant it is to get around on foot. It's pretty standard to have, say, a bus stop that is a little concrete pad surrounded by soggy grass berms and acres of parking.