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The National Academies

NCHRP 10-106 [Completed]

Update of AASHTO Standard Practice for Certification of Inertial Profiling Systems (R 56)

  Project Data
Funds: 249,984
Research Agency: Wood Environment & Infrastructure Solutions, Inc.
Principal Investigator: Amy Simpson
Effective Date: 8/3/2020
Completion Date: 12/16/2022

BACKGROUND: Inertial profilers are used by state highway agencies and others to produce a relatively accurate and repeatable measurement of the pavement profile, which can then be analyzed to produce various smoothness statistics (e.g., International Roughness Index—IRI).  AASHTO R 56, Standard Practice for Certification of Inertial Profiling Systems, describes a certification procedure for operators and test equipment used to measure a longitudinal surface elevation profile of a roadway based on an inertial reference system that is mounted on a data collection vehicle.  The practice stipulates minimum requirements intended to address the need for accurate and repeatable profile measurements for construction quality control/quality assurance, acceptance, and network-level data collection.  However, there is a concern that this practice does not adequately address the range of potential applications (e.g., project-level versus network-level data collection and low and high pavement roughness).  Research is needed to identify the shortcomings of R 56, pursue needed work to identify rational modifications, and develop an updated version of R 56 for consideration and adoption by AASHTO.  

 

 

OBJECTIVE: The objective of this research is to develop an updated version of AASHTO R 56, Standard Practice for Certification of Inertial Profiling Systems, for consideration and adoption by AASHTO. 

 

STATUS: Research is complete; the final report has been published as NCHRP Research Report 1057: Enhancement of the Practice for Certification of Inertial Profiling Systems.

 

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