The Altamont Pass commuter survey study examines commuters’ perceptions and behaviors towards public transportation during 2019-2020. Results are compared with surveys conducted in 2000 and 2006 to investigate whether there have been any longitudinal changes in the perceptions and behaviors of Altamont Pass commuters over the twenty-year interval. As the previous surveys do, this study focuses on the same three counties, namely, San Joaquin, Stanislaus, and Merced that comprise the Northern San Joaquin Valley (NSJV). When compared with the previous surveys, these findings reveal some significant differences of responses to most questions, and minor differences of responses to other questions, prompting several important conclusions
