Stop, yield, and no control at intersections. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Safety features of stop signs at rail-highway grade crossings. Volume II. Technical report. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

An evaluation of stop signs used with flashing traffic signals. Final report.

Turner-Fairbank Highway Research Center, McLean, Va.

Safety features of stop signs at rail-highway grade crossings. Volume I. Executive summary. Final report.

Federal Highway Administration, Offices of Research and Development, Washington, D.C.