Measuring Traffic

Details Measuring Traffic Measuring Traffic

2008-04-18

arxiv.org/abs/0804.2982v1

Statistical Science 2007, Vol. 22, No. 4, 581-597

Statistics

Methodology

Published in at http://dx.doi.org/10.1214/07-STS238 the Statistical Science (http://www.imstat.org/sts/) by the Institute of M

Scientific paper

10.1214/07-STS238

A traffic performance measurement system, PeMS, currently functions as a statewide repository for traffic data gathered by thousands of automatic sensors. It has integrated data collection, processing and communications infrastructure with data storage and analytical tools. In this paper, we discuss statistical issues that have emerged as we attempt to process a data stream of 2 GB per day of wildly varying quality. In particular, we focus on detecting sensor malfunction, imputation of missing or bad data, estimation of velocity and forecasting of travel times on freeway networks.

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