Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6965658 | Accident Analysis & Prevention | 2015 | 10 Pages |
Abstract
In this analysis, the improved procedure was used to explore the effects of the RDG procedure's assumptions. LON recommendations given by the 2011 RDG procedure were compared with recommendations given by this improved procedure. For 55Â mph roads, the 2011 RDG procedure appears to lead to a LON sufficient to intercept between 80% and 90% of right-side departures that would otherwise strike a hazard located 10Â m from the roadway. For hazards closer than 10Â m, the 2011 RDG procedure intercepts progressively higher percentages of real-world departures. This suggests the protection level provided by the 2011 RDG procedure varies with the hazard offset, becoming more conservative as the hazard moves closer to the roadway. The improved procedure, by comparison, gives a consistent protection level regardless of hazard location.
Keywords
Related Topics
Physical Sciences and Engineering
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Chemical Health and Safety
Authors
Nicholas S. Johnson, Robert Thomson, Hampton C. Gabler,