January 19, 2017, 12:00PM (ET)

Pre-certified Method to Estimate Total Transit Usage from Incomplete APC Data for NTD Reporting

This webcast will highlight two guidebooks (one for bus modes and one for rail modes) to a statistical method for transit agencies to estimate total transit usage for reporting to the National Transit Database (NTD) with incomplete data from automatic passenger counters (APC). This method is designed for transit agencies with full coverage of APCs on their fleet, but the guidebooks are useful both to agencies already with full APC coverage and to agencies working towards full APC coverage. The guidebooks identify the conditions under which transit agencies may estimate annual total transit usage with this method as a pre-certified alternative sampling technique. The guidebooks also provide detailed steps for agencies to determine whether they meet these conditions. Each guidebook comes with a document of certification by a qualified statistician. Using this method prevents agencies from under-reporting and saves them the need to hire a qualified statistician for certifying it as an alternative sampling technique.

Presenter: Xuehao Chu, Ph.D., Senior Research Associate, Center for Urban Transportation Research

Dr. Chu is a Senior Research Associate at the Center for Urban Transportation Research, University of South Florida. He has a Ph.D. in economics from the University of California at Irvine. He developed the ACS Statistical Analyzer, an Excel-based template for accessing the statistical quality of American Community Survey (ACS) data and for detecting differences in ACS data over time or across geographies. He has served as the qualified statistician for the NTD reporting efforts of many transit agencies across the country. He also developed the National Transit Database Sampling Manual, including an Excel template for transit agencies to develop sampling plans that reflect their local conditions and minimize their reporting burden.



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  1. When and where will the recorded webinar be available?

    • The webinar recording will be available early next week.

    • I just wanted to let you know, the recording is now available.

  2. I have a question more than a reply. If there is no APC data, can this still be accomplished?

    • We can hold this question for the webinar next Thursday.

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