Take a look at the Radburn superblocks: cul-de-sacs with an extensive interior walkway and park system to make it safe for the kiddies to meet and play. But those feeders betwenn the superblocks do lead to that late night "thump-thump." Why not make the feeders discontinuous in the center of each superblock, with a small visitor parking area surrounded with some benches? Something like Vancouver did to break up the grid but not impede pedestrians. Make local traffic use the outer ring roads, but put concrete pads or pavers and a gate at the center of the feeders so emergency vehicles can still have access.