Nighttime visibility of in-service pavement markings, pavement markers, and guardrail delineation in Alaska (with and without continuous lighting).

Details

• Creators:
  Carlson, Paul ; Miles, Jeff
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Alaska. Dept. of Transportation and Public Facilities ; Alaska. Dept. of Transportation. Research, Development, and Technology Transfer ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Road markings
  • Guardrails
  • Highway safety
  • Raised road markings
  • Reflectorized road markings
  • Lighting
  • Highway delineators
  • Night visibility
  • Visibility
• Publication/ Report Number:
  FHWA-AK-RD-11-04
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alaska
• Corporate Publisher:
  Alaska. Dept. of Transportation and Public Facilities. Research, Development and Technology Transfer
• Abstract:
  This research determined the visibility of in-service pavement markings along lighted and unlighted highway sections, and compared ; visibility of in-service pavement markings to the FHWA proposed minimum retroreflectivity levels for the Alaska Department of ; Transportation and Public Facilities. In order to measure the visibility, researchers measured nighttime luminance in the field with a ; using a customized piece of data collection equipment consisting of an industrial quality hand truck, a regulated switching power ; supply, a global positioning system receiver, a light source, a laptop computer, and a charged couple device photometer. ; Researchers found that all of the pavement markings tested in this study would be in compliance with the Federal Highway ; Administration proposal. Continuous roadway lighting provided better visibility of pavement markings at longer distances than unlit ; highways. Along dark rural highways, the visibility of the raised retroreflective pavement markers and guardrail delineation tabs were ; greater than the pavement markings. All data collected in this project were under dry weather conditions.
• Format:
  PDF
• Funding:
  DOT & PF AKSAS #63399 ; PMD-4000(89) ; RES-11-001
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/20642/dot_20642_DS1.pdf
• File Type:
  [PDF - 957.47 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:88dcf99a3304677db6c809e45ddaadc0c5f3a69f6039d42ed0eea9048a057910fcb9fcf0c7a18905e10ac52c4466d77a1452bcbe68ce2b793117db20872990b6