Evaluating the effectiveness of converging chevron pavement markings.

Details

• Creators:
  Hunter, Michael P. ; Guin, Angshuman ; Boonsiripant, Saroch ; Rodgers, Michael
• Corporate Creators:
  Georgia Tech Research Corporation
• Corporate Contributors:
  Georgia. Dept. of Transportation. Office of Materials & Research ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Traffic speed
  • Traffic control devices
  • Road markings
  • Speed control
  • Traffic safety
  • Highway safety Chevron
  • Speed reduction
  • Safety
• Publication/ Report Number:
  FHWA-GA-10-0713
• Resource Type:
  Tech Report
• Geographical Coverage:
  Georgia
• Edition:
  Final; Aug. 2007-May 2009.
• Corporate Publisher:
  Georgia. Department of Transportation
• Abstract:
  Converging chevron pavement markings have recently seen rising interest in the United States as a ; means to reduce speeds at high-speed locations in a desire to improve safety performance. This report ; presents an investigation into the effectiveness of chevron markings in reducing vehicle speeds on two-lane ; freeway-to-freeway directional ramps in Atlanta, Georgia. The evaluation is based on a statistical comparison ; at pre-selected sites of speeds before and after the installation of the chevron markings. The analysis focuses ; on the impact of converging chevrons over the range of speed percentiles and on the mean speed. ; The analysis indicates that the chevrons had a minimal impact on vehicle speeds, with drivers adjusting ; back to their previous speeds as they acclimate to the treatment. The effect of the chevrons’ treatments on ; speed tended to be most pronounced immediately after the chevron implementation. However, by the ninth ; month after implementation the magnitude of the effect dropped to under 1 to 2 mph for the mean speed and ; most vehicle speed percentiles. While this result does not necessarily imply that the chevron treatment is not a ; meaningful safety treatment, any safety benefits are not likely to result from a general decrease in speeds.
  More +
• Format:
  PDF
• Funding:
  SPR00-0008-00-612
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24619/dot_24619_DS1.pdf
• File Type:
  [PDF - 919.53 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:b57d4f1fbc8f15f69128f60788d89b6636a41429acb5dfef10354ac98700303628104e57c6a51b66dc7bc92344f48c0c4fdb5871799c0d16a2ed0905c7e8c3e5