All indications are that cul-de-sacs are less safe than pre-war neighborhoods layed out in the traditional grid. … [A]ccording California accident statistics, cul-de-sac neighborhoods see more car crashes than the denser pre-war neighborhoods. The older grid patterns also have quicker response times for fire trucks and other emergency vehicles. And accidents and crimes in the older neighborhoods are more likely to be reported faster since they have more people on the streets.

Via Fast Company.