Variational Bayes method for estimating transit route OD flows using APC data.
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2017-01-31
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Alternative Title:USDOT region V regional university transportation center final report : variational Bayes method for estimating transit route OD flows using APC data.
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Abstract:The focus of this study is on the use of large quantities of APC data to estimate OD flows
for transit bus routes. Since most OD flow estimation methodologies based on boarding and
alighting counts were developed before the prevalence of APC technologies, the value of large
quantities of APC boarding and alighting data are not effectively utilized in previously
developed estimation methodologies (Ji et al., 2014; Ji et al., 2015). More specifically, many OD
estimation methodologies – such as the well-known and extensively used Iterative Proportional
Fitting (IPF) procedure (Ben-Akiva et al., 1985; Bacharach, 1970) in its most commonly
implemented form – predominantly rely on aggregated boarding and alighting counts to
determine a time-of-day period OD flow matrix, where the aggregation is performed by stop
across bus trips.
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