NCHRP Report 500 Volume 21: Safety Data and Analysis in Developing Emphasis Area Plans
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NCHRP Report 500 Volume 21:
Safety Data and Analysis in Developing Emphasis Area Plans
(2008)
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Overview

Authors

Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 21: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: Safety Data and Analysis in Developing Emphasis Area Plans provides guidance on data sources and analysis techniques that may be employed to assist agencies in allocating safety funds.

In 1998, the American Association of State Highway and Transportation Officials (AASHTO) approved its Strategic Highway Safety Plan, which was developed by the AASHTO Standing Committee for Highway Traffic Safety with the assistance of the Federal Highway Administration, the National Highway Traffic Safety Administration, and the Transportation Research Board Committee on Transportation Safety Management. The plan includes strategies in 22 key emphasis areas that affect highway safety. The plan's goal is to reduce the annual number of highway deaths by 5,000 to 7,000. Each of the 22 emphasis areas includes strategies and an outline of what is needed to implement each strategy.

Over the next few years the National Cooperative Highway Research Program (NCHRP) will be developing a series of guides, several of which are already available, to assist state and local agencies in reducing injuries and fatalities in targeted areas. The guides correspond to the emphasis areas outlined in the AASHTO Strategic Highway Safety Plan. Each guide includes a brief introduction, a general description of the problem, the strategies/countermeasures to address the problem, and a model implementation process.

Topics

  • Transportation — Highways
  • Transportation — Data and Information Technology
  • Transportation — Safety and Human Factors

Publication Info

107 pages | 8.5 x 11
Contents

Table of Contents

skim chapter
Front Matter i-xi
Summary 1-4
Section I - Introduction 5-5
Introduction to Proposed Procedures 6-7
Crash Data and Related Files 8-10
Roadway Inventory Data 11-11
Driver History Files 12-12
National Emergency Medical Services Information System (NEMSIS) 13-13
Local Data Files 14-14
Closure 15-15
Stage 1 Define/Choose One or More Issues/Emphasis Areas 16-16
Stage 3 Define Treatment Strategies and Target Populations 17-26
Summary 27-27
Possible Program Types Spot versus System Programs 28-28
Procedure 1 Choosing Roadway-Based Treatments and Target Populations When Treatment Effectiveness Is Known, and Both Crash and Non-Crash Data Are Available 29-33
Procedure 2A Choosing Roadway-Based Treatments and Target Populations When Treatment Effectiveness Is Known and Mileposted Crash Data Are Available, but Detailed Inventory Data Are Not Available 34-35
Procedure 2B Choosing Roadway-Based Treatments and Target Populations When Treatment Effectiveness Is Known and Neither Mileposted Crash Data nor Detailed Inventory Data Are Available 36-37
Procedure 3 Choosing Roadway Treatments and Target Locations When Treatment Effectiveness in Terms of Crash/Injury Reduction Is Not Known 38-39
Procedure 4 Choosing Treatments and Target Populations in Emphasis Areas for which Some Candidate Treatments Have Known Effectiveness Estimates and Other Treatments Do Not 40-41
Possible Program Types Spot versus System Programs 42-42
Procedure 1 Choosing Intersection Treatments and Target Populations When Treatment Effectiveness Is Known, and Both Crash and Non-Crash Data Are Available 43-46
Procedure 2A Choosing Intersection Treatments and Target Populations When Treatment Effectiveness Is Known and Mileposted Crash Data Are Available, but Detailed Inventory Data Are Not Available 47-48
Procedure 2B Choosing Intersection Treatments and Target Populations When Treatment Effectiveness Is Known and Neither Mileposted Crash Data nor Detailed Inventory Data Are Available 49-49
Procedure 3 Choosing Intersection Treatments and Target Locations When Treatment Effectiveness in Terms of Crash/Injury Reduction Is Not Known 50-52
Procedure 4 Choosing Treatments and Target Populations in Emphasis Areas for which Some Candidate Treatments Have Known Effectiveness Estimates and Other Treatments Do Not 53-53
Procedure 3 Choosing Roadway User Treatments and Target Subgroups When Treatment Effectiveness in Terms of Crash/Injury Reduction Is Not Known 54-57
Closure Good Data Produce Better Results 58-58
General Strategic Considerations 59-59
Procedure 3 Choosing Treatments and Target Subgroups Related To Illegal Driving Actions When Treatment Effectiveness in Terms of Crash/Injury Reduction Is Unknown 60-63
Alternative Economic Analysis Procedure Choosing Treatments and Target Subgroups for Alcohol-Related Crash Strategies When Treatment Effectiveness in Terms of Alcohol-Related Crash/Injury Reduction Can Be Estimated 64-65
Alternative Procedure Choosing Treatments and Target Subgroups for Alcohol-Related Crash Strategies Based On Existing DWI Program Needs 66-66
Closure 67-67
General Strategic Considerations 68-68
Procedure 3 Choosing Treatments and Target Subgroups Related To Unsafe Driving Actions When Treatment Effectiveness in Terms of Crash/Injury Reduction Is Unknown 69-72
Closure 73-73
Procedure 3 Choosing Treatments and Target Subgroups for Crashes Involving Special Vehicle Types When Treatment Effectiveness in Terms of Crash/Injury Reduction Is Not Known 74-77
Closure Good Data Produce Better Results 78-78
Section X - Reducing Crashes in Work Zones 79-79
Level 1 Analysis 80-81
Level 2 Analysis 82-83
Level 4 Analysis 84-85
Procedure 86-88
Closure 89-89
Organizational Issues 90-90
Data Improvement Strategies 91-92
Closure Good Data Produce Better Results 93-93
Key References 94-95
Abbreviations used without definitions in TRB publications 96-96

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