ASTM WK41917

    New Practice for Computing Pathway Roughness Index from Longitudinal Profile Measurements

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    Developed by Subcommittee: E17.33 | Committee E17 | Contact Staff Manager


    1. Scope

    1.1 This practice covers the mathematical processing of longitudinal profile measurements to produce a pedestrian pathway roughness statistic called the Pathway Roughness Index (PRI). 1.2 The intent is to provide a standard practice for computing and reporting an estimate of pathway roughness for sidewalks and other pedestrian surfaces. 1.3 This practice is based on an algorithm developed at the Human Engineering Research Laboratories sponsored by the Access Board and reported in a Transportation Research Board (TRB) paper(1). 1.4 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    roughness; sidewalk; pathway roughness index; pathway; longitudinal profile; pedestrian


    This standard is necessary due to the lack of an established method for computing the roughness of sidewalks and other pedestrian surfaces in the community. The potential users of this standard will be municipal and other government agencies. Sidewalk roughness estimations will allow these users to determine when and where to apply repairs and replacements to surfaces most effectively. Sidewalk roughness is particularly important to wheelchair users where the vibrations from rough surfaces over time can easily exceed safe levels and have been shown to result in negative consequences for the user.

    Citing ASTM Standards
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