Surveys of road curvature, super elevation, gradient, and number and distance from the roadway of roadside hazards were conducted at 300 sites in Georgia of fatal crashes into fixed objects and 300 comparison sites one mile away on the road that the vehicle likely had traveled. It is concluded that top priority should be given to roadside hazard modification on and near curves greater than 6 degrees, particularly those accompanied by downhill grades of 2% or steeper, on nonlocal roads.
Abstract