The new “Dalton Delineator” is a cantilever structure consisting of a short length of a Davidson Flexi-Guide FG 400 Roadside Delineator post mounted to a special flexible coupler. The coupler in turn is attached to a square steel tube support that is installed off of the traveled roadway. The delineator post, or “arm” projects horizontally out from the shoulder, above the roadway; is capable of rebounding when struck, and provides excellent reflectivity at night.