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Clarifying the quadrennial needs study process.

File Language:
English


Details

  • Creators:
    Cable, James K.
  • Corporate Creators:
    Iowa State University
  • Corporate Contributors:
    Iowa. Dept. of Transportation ; Iowa. Highway Research Board
  • Subject/TRT Terms:
  • Publication/ Report Number:
    HR-363
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Iowa
  • Edition:
    Final report.
  • Corporate Publisher:
    Iowa. Dept. of Transportation
  • Abstract:
    The Quadrennial Needs Study was developed to assist in the ; identification of highway needs and the distribution of road funds ; in Iowa among the various highway entities. During the period 1978 ; to 1990, the process has seen large shifts in needs and associated ; funding distribution in individual counties with no apparent ; reasons. This study investigated the reasons forsuchshifts. ; The study identified program inputs that can result in major ; shifts in needs either up or down from minor changes in the input ; values. The areas of concern were identified as the condition ; ratings for roads and structures, traffic volume and mix counts, ; and the assignment of construction cost areas. Eight counties ; exhibiting the large shifts (greater than 30%) in needs over time ; were used to test the sensitivity of the variables. A ninth ; county was used as the base line for the study. ; Recommendations are identified for improvements in the process ; of data collection in the areas of road and structure condition ; -- ; rating, traffic, and in the assignment of construction cost areas. ; Advice is also offered in how to account for changes in ; jurisdiction between successive studies. Maintenance cost area ; assignment and levels of maintenance service are identified as ; requiring additional detailed research.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/23375/dot_23375_DS1.pdf
  • File Type:
    Filetype[PDF - 975.26 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha-512:79c19e8342c89f19dc33d03bf6ae5bb37a7197b47835fecd0fdb23fadaea28a0a1a529f7dbb4e207b4b5396836e6a9a8e3863595c3e37fcd12cfb261cf609782
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