A major problem with the high-density occupancy issue is the persistent absolute insistence that every vertical structure end at a few hundred feet, forcing eve

A major problem with the high-density occupancy issue is the persistent absolute insistence that every vertical structure end at a few hundred feet, forcing everyone to ground level. Of course frequent forcing of a volumetric problem to a planar solution will have congestion problem, and increasing the range of the third dimension just makes moving from one building to another worse. To wit: stop limiting buildings to single-block dimensions. Span the roads, not just with the occasional bridge, but by extending whole buildings.