I lived on a cul-de-sac until I was 7, the end of our street there was a "pedestrian" (unofficial) cut through to the highschool, so that was convenient for my sister (who was 10 yrs older, and technically lived far enough away to require busing). The next street down from us towards the rest of the world, where my bestest friend in the universe lived, was also a cul-de-sac... with an island in the middle that was HUGE, and it had 100 foot tall pine trees growing in it (scale to 7yrold eyes). We spent every summer climbing up to the tippy top of those trees, falling out of them (at least a broken arm a season), and riding bikes around them. AWESOME. I pitched a fit when we moved to the city, but even in the city we lived on Ridgeville - little road with no traffic and lots of kids. When I moved to Beeler at 10, I stopped going outside (nothing but city buses and obnoxious college kids on a busy street with nothing to do, not allowed to walk to nearest park where there were no kids to play with anyway).
Now? I live in the 'burbs (for a shorter commute 6 years ago, in a 1925 house, so they built dumb back then too, but I guess I was a Verona 'burb back when it was the closest 'city'), and kids play hockey/basketball in the street now, cul-de-sac or not.
People like cul-de-sacs because the only people that should be there, live there, so theoretically they are known and "safe". These people clearly don't understand that most violent crimes are commited by perpetrators known to the victims (as any tv crime drama will tell you).
back to the topic at hand, re: technology... I have many coworkers who used to think that we were in agreement, because they support "green" technology like solar panels and fuel cells and wind farms, and I'm a "hippy"...
The truth is uncomfortable - convenience on the level that we have grown accustomed to is not sustainable. It is much more fun to consider futuristic engineering solutions so we can live like the Jetsons than future austerity measures reducing this country to living on par with the rest of the world and much more like the Amish than the Jetsons.