Installation Guidance for Centerline and Edgeline Rumble Strips in Narrow Pavements, TR-696

The installation of centerline rumble strips (CLRS) and shoulder rumble strips (SRS) on two-lane rural highways is a proven safety countermeasure. Placement of both CLRS and SRS can usually be accommodated within wide pavements (24 feet or greater paved width) without issue. However, proper placement of one or both is less straightforward for highways with paved widths less than 24 feet. This becomes especially difficult as widths approach 20 feet. Contributing factors such as traffic volume, roadway alignment, and the presence of roadside hazards may suggest the use of one type of rumble strip over another. However, no guidance currently exists regarding the minimum paved width necessary to install both CLRS and SRS, or which one to install when the installation of both is infeasible. The purpose of this study is to provide guidance to assist county road agencies, as well as the Iowa Department of Transportation (IDOT), in determining when to install rumble strips based on various site-specific factors.


    • English


    • Status: Completed
    • Contract Numbers:


      ISU proposal 131776;

      Add 547

    • Sponsor Organizations:

      Iowa Department of Transportation

      800 Lincoln Way
      Ames, IA  United States  50010
    • Managing Organizations:

      Iowa State University, Ames

      Center for Transportation Research and Education
      2711 South Loop Drive, Suite 4700
      Ames, IA  United States  50010-8664
    • Project Managers:

      Goetz, Vanessa

    • Performing Organizations:

      Iowa State University, Ames

      Institute for Transportation
      ISU Research Park
      Ames, IA  United States  50011-8664
    • Principal Investigators:

      Sharma, Anuj

      Savolainen, Peter

    • Start Date: 20150701
    • Expected Completion Date: 20180228
    • Actual Completion Date: 0
    • Source Data: RiP Project 40001

    Subject/Index Terms

    Filing Info

    • Accession Number: 01569267
    • Record Type: Research project
    • Source Agency: Iowa Department of Transportation
    • Contract Numbers: TR-696, ISU proposal 131776;, Add 547
    • Files: RiP, STATEDOT
    • Created Date: Jul 8 2015 1:00AM