The 12-Foot-Wide Traffic Lane Must DieDamon Lavrinc10/06/14 5:45pm26616EditPromoteDismissUndismissHideGo to permalinkWhat's the greatest threat to pedestrians? Drunk drivers? Ornery bicyclists? Rabid beavers? If Jeff Speck, a D.C.-based city planner is to be believed, it's wide lanes. Specifically, the 12-footers that are de rigueur in most parts of the country.