XMobile   Travel Quality Study

This project led by Andre Carrel is working on a study to understand the link between transit reliability, service quality and ridership retention. The study aims to demonstrate the extent to which reliable transit service can contribute to ridership retention, and vice versa. A cohort of 200 to 1,000 San Francisco residents will be recruited, which will include both regular transit riders and non-riders (auto users). Auto users will commit to using public transportation for at least a week during the study period. The XLab Mobile infrastructure will be used to collect location data from participants in order to reconstruct travel diaries, and to periodically ask them to answer surveys on the trip quality they experienced when using public transportation.

Andre Carrel is a Ph.D. candidate in the Department of Civil and Environmental Engineering at UC Berkeley, and he is the lead researcher conducting the San Francisco Travel Quality study. A graduate of MIT and ETH Zurich, Andre has previously worked with Transport for London and Deutsche Bahn, the German national rail operator. He is focusing on understanding the complex relationships between transit reliability, the quality of transit services, traveler satisfaction and transit ridership, with the goal of gaining concrete insights into how to best improve public transportation in San Francisco and other major US cities.