United States Department of Transportation
i
S-HAL : safety handbook for locals.
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2014
[PDF-7.66 MB]
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Edition:4th ed.
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Abstract:The Safety Handbook for Locals (S-HAL) is intended to be a comprehensive
traffic safety resource for all local communities in Missouri, be it cities or
counties. The S-HAL mirrors the national Highway Safety Manual (HSM)
(AASHTO, 2010) in using a systematic and data-driven approach to
improving traffic safety. The HSM is expected to significantly influence local policy and
engineering practice, in the same way that the Highway Capacity Manual transformed
traffic impact analysis for planning and site development. It is important that the S-HAL is consistent with the principles and techniques promoted in the HSM, which
was developed using a wealth of national highway safety knowledge and experience;
the S-HAL takes advantage of the same wellspring of knowledge. The HSM is divided
into four major parts. Part A discusses fundamentals of traffic safety, including human
factors. Part B presents the safety management process, namely, network screening,
diagnosis, countermeasure design, economic appraisal, project prioritization, and safety
effectiveness evaluation. Part C describes predictive methods for rural highways, and
urban and suburban arterials. Part D lists crash modification factors for a wide range of
transportation facilities and treatments. The S-HAL covers the same topics as the HSM
but not in as much detail. Also, the S-HAL focuses on facilities that are of more
interest to local communities; thus freeway and expressway facilities are not covered in
the S-HAL. Even though the types of topics covered in the HSM and the S-HAL are
similar, the S-HAL is organized into seven chapters instead of four parts. Topics
covered in the S-HAL include establishing a traffic records system, screening for
problem locations, analyzing conflict and crash patterns, designing safety
improvements, conducting road safety audits, and accessing national and regional
safety resources. The S-HAL can be considered a gateway to HSM, since it introduces
readers to the theory and techniques presented in the HSM.
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