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Pavement markings and safety.

File Language:
English


Details

  • Creators:
    Smadi, Omar ; Hawkins, Neal ORCID ICON IMG ; Nlenanya, Inya ; Aldemir-Bektas, Basak
  • Corporate Creators:
    Iowa State University. Center for Transportation Research and Education
  • Corporate Contributors:
    Iowa. Highway Research Board ; Iowa. Dept. of Transportation
  • Subject/TRT Terms:
  • Publication/ Report Number:
    IHRB Project TR-580;InTrans Project 08-306
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Iowa
  • Edition:
    Final report.
  • Corporate Publisher:
    Iowa State University. Institute for Transportation
  • Abstract:
    Previous research on pavement markings from a safety perspective tackled various issues such as pavement marking retroreflectivity ; variability, relationship between pavement marking retroreflectivity and driver visibility, or pavement marking improvements and ; safety. A recent research interest in this area has been to find a correlation between retroreflectivity and crashes, but a significant ; statistical relationship has not yet been found. ; This study investigates such a possible statistical relationship by analyzing five years of pavement marking retroreflectivity data ; collected by the Iowa Department of Transportation (DOT) on all state primary roads and corresponding crash and traffic data. This ; study developed a spatial-temporal database using measured retroreflectivity data to account for the deterioration of pavement markings ; over time along with statewide crash data to attempt to quantify a relationship between crash occurrence probability and pavement ; marking retroreflectivity. ; First, logistic regression analyses were done for the whole data set to find a statistical relationship between crash occurrence probability ; and identified variables, which are road type, line type, retroreflectivity, and traffic (vehicle miles traveled). The analysis looked into ; subsets of the data set such as road type, retroreflectivity measurement source, high crash routes, retroreflectivity range, and line types. ; Retroreflectivity was found to have a significant effect in crash occurrence probability for four data subsets—interstate, white edge line, ; yellow edge line, and yellow center line data. For white edge line and yellow center line data, crash occurrence probability was found to ; increase by decreasing values of retroreflectivity.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/18562/dot_18562_DS1.pdf
  • File Type:
    Filetype[PDF - 1.96 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha-512:e33463d5b8f38f5a5cffd165b90bc8471f80f823e7b2d18fc4665d84823c266f3752f09c4c5277f7f865b4f29a6de3e10e64ab2bd0364018f0f9a191d4031f16
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