Two studies are reported. The study initiated by Calspan Corporation which concentrated on accident statistics, was planned to determine the degree to which accident data currently being accumulated by various agencies can be used to evaluate the field performance of barrier systems and, if warranted, to recommend new approaches that may better be used to make such an evaluation. The second study (by A.L. Elliot) set out to determine the feasibility of evaluating barrier systems through personal interviews with maintenance, safety, and traffic operations personnel in highway agencies; five representative states were visited for this purpose. In the Calspan study, specific data items of interest were identified through analysis of available data, a survey of highway departments, and discussions with the project advisory panel and with individuals in government and private agencies. This data was combined with that from the experience of Calspan personnel in highway accident investigation, crash test programs, barrier design and testing and statistical analyses to determine the data items appropriate to evaluations of barrier performance. The study identified the spot improvement programs conducted in most states as the best potential source of data at present. The study concluded that because of the variations among states with respect to barrier systems, comparative evaluations require some central national system of data collection. The inclusion of a limited amount of barrier information in a broader program by the Federal government appears the most feasible. This will permit statistical evaluation and the detection of problem areas for special study. Mr. Elliot's study concluded that his informal approach to barrier evaluation has real merit and that useful data may be obtained by visiting with selected individuals in a small number of representative states.

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    Transportation Research Board

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  • Publication Date: 1975-8

Media Info

  • Media Type: Digital/other
  • Pagination: 3 p.
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    Open Access (libre)

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Filing Info

  • Accession Number: 00126812
  • Record Type: Publication
  • Contract Numbers: 22-3 & -3A
  • Files: TRIS, TRB
  • Created Date: Dec 16 1975 12:00AM