Impact of Shoulder Rumble Strips and Centerline Rumble Strips on Vehicle Lateral Position on Two-Lane, Undivided Roadways

While previous research has shown that shoulder rumble strips (SRS) and centerline rumble strips (CRS) on two-lane, undivided roadways reduce targeted crashes, there are still questions about their impact on vehicle lateral placement in a travel lane (especially where lane widths are < 12 ft). Recently, researchers designed and conducted a field study to investigate the impact of SRS and CRS on vehicle lateral placement in the travel lane of two-lane, undivided roadways. At CRS-only sites and sites with both CRS and SRS on narrow shoulders (1- to 3-ft), drivers tend to position the center of their vehicle closer to the center of the travel lane than if the rumble strips were not there. In contrast, on roadways with larger shoulder widths (9 ft) neither of these rumble strip scenarios appears to practically affect the lateral position of vehicles in the travel lane. The effect of SRS located within 7 to 9 inches of the edgeline on the lateral position of vehicles in the travel lane was highly variable; thus, their impact was not as clear. Nevertheless, it does appear that SRS located near the edgeline may cause drivers to center their vehicles closer to the centerline in some cases. Researchers did find that SRS located further from the edgeline (35 inches) did not practically affect the lateral position of vehicles in the travel lane. Furthermore, it seems that the effect of SRS close to the edgeline on vehicle lateral placement can be mitigated by including CRS.


  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References; Tables;
  • Pagination: 16p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01152261
  • Record Type: Publication
  • Report/Paper Numbers: 10-3528
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 11:47AM