Studies to determine the operational effects of shoulder and centerline rumble strips on two-lane undivided roadways.

Details

• Creators:
  Finley, Melisa D. ; Funkhouser, Dillon S. ; Brewer, Marcus A.
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Rumble strips
  • Road shoulders Rumble strips--Texas--Evaluation
  • Roads--Shoulders
• Publication/ Report Number:
  FHWA/TX-09/0-5577-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical report; Sept. 2006-Aug. 2008
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  This report describes the methodology and results of analyses performed to (1) evaluate the impact of ; shoulder rumble strips (SRS) and centerline rumble strips (CRS) on the placement of vehicles in the travel ; lane of two-lane, undivided roadways and (2) determine the minimum shoulder width required for drivers to ; correct errant vehicle trajectories once alerted by passing over SRS. Field studies indicated that CRS on twolane, ; undivided roadways with lane widths as narrow as 10 ft do not adversely impact the lateral placement ; of the vehicle in the travel lane. In fact, at locations with smaller shoulder widths (1 to 2 ft) drivers ; positioned the center of their vehicles closer to the center of the lane. Similar effects were found at locations ; with both edgeline rumble strips (ERS) and CRS. The impact of SRS located within 7 to 9 inches of the ; edgeline on the lateral placement of vehicles in the travel lane was less clear. However, it does appear that ; SRS located near the edgeline may shift vehicle travel paths closer to the centerline. In contrast, SRS located ; 35 inches from the edgeline did not seem to impact the lateral placement of vehicles in the travel lane. In ; addition, lateral offsets that position the center of 16-inch SRS in the middle of the shoulders at least 4-ft ; wide should provide enough remaining shoulder width for the 85th percentile distracted driver to correct their ; errant vehicle trajectory before leaving the paved roadway surface. Additional findings from all of the studies ; and detailed recommendations are discussed in the report.
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• Format:
  PDF
• Funding:
  0-5577
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/16763/dot_16763_DS1.pdf
• File Type:
  [PDF - 1.03 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:6eb5d9db43d9d1767a4af9969d82edb29657fb0eec380ba4a0087c45094cb3e9d86e8fa7cc7293754aea55ac4c8d9a92f3ec668d89de93bc6a8c163893b53833