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S-HAL : safety handbook for locals.
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S-HAL : safety handbook for locals.
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  • Edition:
    4th ed.
  • 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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