Trip generation data collection in urban areas.

Abstract

There is currently limited data on urban, multimodal trip generation at the individual site level. This lack of data limits the ability of transportation agencies to assess development impacts on the transportation system in urban and multimodal contexts. This project sought to begin addressing this gap by developing and testing a protocol for collecting trip generation by mode at the site level. The report provides a comprehensive review of previous research and develops and defines a data collection protocol for site and context data. The report documents the results of a pilot data collection that tests the protocol. The results of the pilot data collection are compared to the predicted impacts based on the industry standard, the Institute of Transportation Engineers (ITE) Trip Generation Manual, and to six alternative methods, all of which pivot from ITE’s data. None of the existing methods reliably predict the field data. The report identifies next steps for the District Department of Transportation (DDOT) and other agencies to take to improve multimodal trip generation estimation. To that end, a field-guide for future data collection, based on this pilot, is included as an appendix.

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