1) FHWA (Federal Highway Administration) web site (http://safety.fhwa.dot.gov/roadway_dept/rumble/)
2) Wood, N.E. : Shoulder Rumble Strips : A Method to Alert Drifting Drivers. Pennsylvania Turnpike Commission, Harrisburg, Pa., 1994.
3) Chen, C.S. : A Study of Effectiveness of Various Shoulder Rumble Strips on Highway Safety. Virginia Department of Transportation, Richmond, Va., 1994.
4) Griffith, M.S. : Safety Evaluation of Rolled-in Continuous Shoulder Rumble Strips Installed on Freeways. In Transportation Research Record 1665, TRB, National Research Council, Washington, D.C., pp.28-34, 1999.
5) Perrillo, K. : The Effectiveness and Use of Continuous Shoulder Rumble Strips; Federal Highway Administration, August 1998.