Quantitative Evaluation of Highway Safety Performance Based on Design Consistency

Highway designers can theoretically improve roadway safety by evaluating design consistency. Research has identified four major areas in which the most promising consistency measures fall: operating speed, vehicle stability, alignment indices, and driver workload. Previous research primarily has focused on developing models to estimate consistency measures, with secondary focus on quantitatively relating safety performance to these measures. The authors discuss a study to quantify relationships between individual and combined consistency measures to actual collision experience through regression analysis. A database of horizontal curves representing different classes of two-lane rural highways in Eastern Ontario provided a study model. Researchers developed several statistically significant consistency measures to collision frequency relationship models which allowed examination of safety performance sensitivity for each model. These models may be used in safety-focused highway design because they represent a quantitative evaluation tool for design improvement safety benefits.

  • Availability:
  • Authors:
    • Awatta, M
    • Hassan, Yasser
    • Sayed, T
  • Publication Date: 2006-7


  • English

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Filing Info

  • Accession Number: 01042792
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Feb 26 2007 4:32PM