Foursquare ITP, in partnership with Transportation Foundry, authored a report for the Transit Cooperating Research Program (TCRP) on the transit rider survey methods and technologies. Over the last ten years new technologies, data processing techniques, and regulatory requirements have changed how transit providers survey their riders. The synthesis seeks to understand the current state of practice through a detailed literature review, survey of over 60 transit providers across the country, and four in-depth case studies. The resulting report was published in April 2019.