Construction of new profiler certification tracks.
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2014-04-01
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Abstract:The existing smoothness specifications of the Texas Department of Transportation (TxDOT) require
certification of inertial profilers for ride quality assurance testing. Currently, inertial profilers are certified
based on profile measurements collected on dense-graded hot-mix asphalt concrete sections. However, the
same profilers are used to measure smoothness of asphalt, Portland cement concrete, and flexible base
sections with distinctly different textures than the dense-graded asphalt surfaces on which these profilers
were certified. TxDOT also uses inertial profilers to measure the smoothness of the state highway network
as part of the department’s annual pavement condition surveys to support pavement management
applications. A significant percentage of this network consists of roads with seal coat surfaces and surface
treatments. Since texture affects the international roughness index, there is a need to build additional
sections to certify profilers over the range of textured surfaces on which they will be used. This project aims
to enhance TxDOT’s profiler certification program by building additional test sections at the Texas A&M
Riverside Campus to include surfaces with different textures and smoothness levels. These new sections are
expected to improve the validity and applicability of TxDOT’s certification program, and also the accuracy
of ride quality measurements.
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