1. Agent, K.R., Pigman, J.G., Stamatiadis, N., 2001. Countermeasures for Fatal Crashes on Two-lane Rural Roads. University of Kentucky Transportation Center, Lexington, KY.
2. Campbell, K., Lepofsky M., Bitner A., 2003. Detailed Planning for Research on Making a Significant Improvement in Highway Safety: Study 2—Safety. Prepared for Future Strategic Highway Research Program (F-SHRP), Transportation Research Board. Available: http://www.gulliver.trb.org/news/blurb_detail.asp?id=2092.
3. Delaware Department of Transportation, 2003. Centerline rumble strips—the Delaware experience. Dover, DE. Available http://www.deldot.net/static/projects/rumblestrip/handout.pdf.
4. Federal Highway Administration, 2001. Draft Technical Advisory: Roadway shoulder rumble strips. Washington, DC. Available http://www.safety.fhwa.dot.gov/fourthlevel/rumstrp_ta.htm.
5. Federal Highway Administration, Turner-Fairbank Highway Research Center, 2003. Highway Safety Information Service (HSIS). McLean, VA. Available http://www.hsisinfo.org.