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Tri-County Metropolitan Transportation District of Oregon, Transportation -- Oregon -- Portland -- Planning, Local transit -- Technological innovations

Physical Description

1 online resource (21 p.)


This paper presents findings from a study assessing the accuracy and precision of automatic passenger counter (APC) technology at Tri-County Metropolitan Transportation District of Oregon (Tri-Met). Video surveillance cameras, rather than ride checkers, were used to establish reference values for determining APC accuracy and precision. Analysis of data collection, processing and reporting methods at Tri-Met indicates that APC data, along with a properly designed sampling plan, can be used for internal monthly ridership reporting and annual National Transit Database (NTD) reporting. Presently, NTD sampling plans require that bus trips be randomly selected prior to manual data collection efforts. The sampling methodology developed for this analysis allows APC data to be matched with a random selection of bus trips following automated data collection.


Catalog Number PR124

Published by the Center for Urban Studies, College of Urban and Public Affairs, Portland State University.

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