Highway agencies have traditionally managed the safety improvement process by identifying and correcting high-crash locations (“hot-spots”), where concentrations of crashes and, often, patterns of crashes of similar types, were found. However, when crashes are evaluated over too short a period of time (3 years or less), locations may be identified as hot-spots simply due to the random nature of where crashes occur.
The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 285: Developing a Guide for Quantitative Approaches to Systemic Safety Analysis describes the research methodology and findings that supported the development of a systemic safety - an alternative (or supplement) to the hot-spot approach - analysis guide and associated training materials.
The document is supplemental to NCHRP Research Report 955:Guide for Quantitative Approaches to Systemic Safety Analysis.
Table of Contents
|Section 1. Introduction||8-19|
|Section 2. Summary of Literature Review||20-37|
|Section 3. Agency Survey of Practice||38-51|
|Section 4. Summary of Agency Site Visits||52-80|
|Section 5. Conclusions and Future Research||81-84|
|Section 6. References||85-86|
|Appendix A. Implementation of the Research Findings||87-93|
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