NCHRP Report 518: Safety Evaluation of Permanent Raised Pavement Markers
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  • Status: Final Book
  • 71 pages
  • Downloads: 16
NCHRP Report 518:
Safety Evaluation of Permanent Raised Pavement Markers
(2004)
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Overview

Authors

Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 518: Safety Evaluation of Permanent Raised Pavement Markers examines the safety performance of snowplowable permanent raised pavement markers on two-lane roadways and four-lane freeways.

Topics

  • Transportation — Pavements
  • Transportation — Safety and Human Factors
Contents

Table of Contents

skim chapter
Front Matter i-x
Summary 1-2
Chapter 1 - Introduction 3-3
2.1.2 Retroreflective PRPMs 4-4
2.1.3 Implementation Criteria and Maintenance Procedures 5-6
2.2.1 Review of Literature 7-11
2.2.2 Methodological Problems in Past Research 12-12
2.3.1 Driver Needs with Respect to Delineation and Visibility 13-13
2.3.2 Visibility of PRPMs 14-16
2.3.3 Driver Behavior in Response to PRPMs 17-22
2.3.4 Summary 23-23
3.1 State Survey and Selection of Potential States for PRPM Safety Evaluation 24-24
3.2.1 PRPM Treatment Sites Inventory 25-25
3.2.2 Reference and Comparison Group Sites 26-26
3.2.3 Crash Data 27-27
3.2.5 Traffic Volume Data 28-30
3.2.6 Additional Delineation and Guidance Measures 31-32
4.1 Composite Analysis Methodology 33-33
4.2.2 Multivariate Modeling of the Index of Effectiveness (Theta) 34-34
4.3.3 Multivariate Modeling of the Index of Effectiveness (Theta site) 35-36
4.4.1 Composite Analysis 37-38
4.5 Results of the Composite Analysis for Four-Lane Divided Expressways 39-39
5.1.1 Overview of Human Factors Issues 40-40
5.1.2 Expected PRPM Impacts on Two-Lane Roadways 41-41
5.2.2 Expected PRPM Impacts on Four-Lane Freeways, 42-43
6.1 Background 44-44
6.4 Proposed Revisions to the MUTCD 45-45
6.5 Overview of the Analytical Engineering Procedure 46-46
6.6.2 Step 2: Estimate Expected Nighttime Nonintersection Crashes without PRPMs 47-47
6.6.3 Step 3: Estimate Expected Nighttime Nonintersection Crashes with PRPMs 48-48
6.6.5 Step 5: Conduct a Benefit-Cost Analysis 49-50
Chapter 7 - Conclusions 51-52
References 53-54
Appendix A - Details of Calibrated Safety Performance Functions 55-60
Abbreviations used without definitions in TRB publications 61-61

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