Innovative means of collecting international roughness index using smartphone technology
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Date
2014
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Publisher
University of New Brunswick
Abstract
International Roughness Index (IRI) is a widely used pavement performance measure
collected with specially equipped vehicles; however, the cost of data collection may
limit the ability of some road authorities to procure the data. Recent advances in
smartphone technology have created interest in their potential to be low-cost mobile data
collection platforms.
This study compared IRI from an inertial profiler to IRI calculated from a smartphone' s
accelerometer over a 1 km test section of road in New Brunswick, Canada. The study
also included four scenario tests to evaluate the effects of varying the following
experimental factors: vehicle type, device manufacturer, mounting arrangement and
speed. The correlation between the smartphone' s results and those collected using the
inertial profiler was found to be 88.9% for 100m increments along the section. The
scenarios returned average IRI values ranging from 0.8% to 85% different than the
average IRI of 2.60 m/km collected using the inertial profiler, though the smartphone
configurations had higher coefficient of variations ranging from 2.05 to 9.11 compared
to the inertial profiler's 1.12.