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Pages 145-152

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From page 145...
... D-1   Probability of Passing Through, Over, or Under a Barrier (THRBAR) A P P E N D I X D CONTENTS Chapter 1 Introduction Chapter 2 Background Chapter 3 Simulated Encroachment Data Chapter 4 THRBAR for Guideline Development References
From page 146...
... D-2 Selection and Placement Guidelines for Test Level 2 Through Test Level 5 Median Barriers CHAPTER 1 INTRODUCTION The ability to reasonably predict the number of penetrate-the-barrier, roll-over-thebarrier, and vault-the-barrier crashes (THRBAR) is critical to understanding barrier performance and selecting a barrier.
From page 147...
... Probability of Passing Through, Over, or Under a Barrier (THRBAR) D-3   CHAPTER 2 BACKGROUND The RSAPv3 Engineer's Manual developed in NCHRP Project 22-27 reviewed the advantages and disadvantages of employing a mechanistic approach or an empirical approach to estimating barrier penetrations.
From page 148...
... D-4 Selection and Placement Guidelines for Test Level 2 Through Test Level 5 Median Barriers CHAPTER 3 SIMULATED ENCROACHMENT DATA RSAPv3 simulations were generated to capture both the mechanistic and empirical calculations from the barrier breach module already coded within the RSAPv3 software. A subset of 114 available field-reconstructed passenger vehicle trajectories included in the analysis is identified in Table D-2 using the identifier from the research project in which the trajectories were gathered.
From page 149...
... Probability of Passing Through, Over, or Under a Barrier (THRBAR) D-5   Name MASH Test Level Height (inches)
From page 150...
... D-6 Selection and Placement Guidelines for Test Level 2 Through Test Level 5 Median Barriers CHAPTER 4 THRBAR FOR GUIDELINE DEVELOPMENT It is understood that not all vehicles will be contained under all impact conditions. It is presumed, however, for guideline development, that each test level contains the types of vehicles it was designed for.
From page 151...
... Probability of Passing Through, Over, or Under a Barrier (THRBAR)

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