S-HAL : safety handbook for locals.
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  • English

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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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