Retroreflectivity of existing signs in Pennsylvania.

Details

• Creators:
  Clevenger, Kyle ; Colello, Karen ; Quirus, Jeannette
• Corporate Creators:
  McCormick Taylor (Firm)
• Corporate Contributors:
  Pennsylvania. Dept. of Transportation. Bureau of Maintenance and Operations ; United States. Federal Highway Administration
• Subject/TRT Terms:
  Expected Sign Life Reflective Signs Retroreflectivity Service Life Sign Management System Sign Retroreflectivity Sign Service Life Traffic Signs
• Publication/ Report Number:
  FHWA-PA-2012-003-E01041-WO9
• Resource Type:
  Tech Report
• Geographical Coverage:
  Pennsylvania
• Edition:
  Final report.
• Corporate Publisher:
  Pennsylvania. Dept. of Transportation
• Abstract:
  The Pennsylvania Department of Transportation (PennDOT) Bureau of Highway Safety and Traffic Engineering initiated this
  
  research effort in response to the release of the new 2009 Manual on Uniform Traffic Control Devices (MUTCD) which mandates
  
  that all states shall have a sign maintenance method designed to maintain traffic sign retroreflectivity at or above the established
  
  minimum levels in place by January 2012. The goal of this research effort was to collect and analyze sign retroreflectivity
  
  measurements on a subset of PennDOT owned and maintained signs throughout the Commonwealth of Pennsylvania in order to
  
  better understand the potential service life of signs with regard to nighttime visibility in Pennsylvania. As PennDOT implements its
  
  sign management system, with respect to compliance with the minimum retroreflectivity levels, the findings of this research will
  
  assist PennDOT in better determining when signs may need replaced. Retroreflectivity levels were measured on a sample of 1,000
  
  traffic signs using a DELTA Light and Optics RetroSign 4500 retroreflectometer. In order to obtain regional variety, an equal
  
  portion of signs (one third in each county) were measured in Lackawanna, Lehigh and Lancaster counties to represent the
  
  northern, central and southern tiers of the state. The number of yellow warning signs, white regulatory signs, green directional
  
  signs and red Stop, Yield, Do Not Enter and Wrong Way signs to be measured was determined using the proportion of each sign
  
  color’s overall population in the state. PennDOT’s current standard specifications for reflective sheeting require the use of Type III
  
  or Type IV sheeting for post-mounted sign installations and the sign sheeting manufacturer warranties are typically 10 years;
  
  therefore the data collection efforts were limited to Type III signs aged 10 years or older. The study recommends an expected sign
  
  life of 15 years for yellow, white, red and green signs in Pennsylvania.
  
  
• Format:
  PDF
• Funding:
  E01041, Work Order 9
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:fbf423c1806ea48f3fb81aa4e7e831741705e74791c352a960e50ed82858a609
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24483/dot_24483_DS1.pdf
• File Type:
  [PDF - 1.48 MB ]