Broadening Understanding of the Interplay Among Public Transit, Shared Mobility, and Personal Automobiles

This report extends the research presented in TCRP Research Report 188: Shared Mobility and the Transformation of Public Transit. It broadens understanding of the interplay between emerging and established modes of transportation by further exploring how shared modes, particularly transportation network companies, are being incorporated into the mix of transportation options. Research on transportation network companies (TNCs) has been limited, in most instances, by the lack of necessary and appropriate data. This research addresses this obstacle by drawing on several important sources of data and information: hourly origin-destination TNC trip data for five regions (Chicago, Los Angeles, Nashville, Seattle, and Washington, D.C.) was provided by a major TNC and similar modeled information for the city of San Francisco was provided by the San Francisco County Transportation Authority (SFCTA); a survey of more than 10,000 transit and other shared mobility users in eight metropolitan areas was administered by the researchers; and transit rider surveys about TNC use were administered by public transit agencies in Atlanta, the San Francisco Bay Area, New Jersey, and Washington, D.C. Key findings from this research indicate that the heaviest TNC use across the regions in this study is during the evening hours and weekends. Most TNC trips in the study regions are short and concentrated in the downtown core neighborhoods. There is no clear relationship between the level of peak-hour TNC use and the longer-term changes in the study regions’ public transit usage. Among survey respondents, people who use transit or commute by driving solo do so as part of a routine while TNCs are used on a more occasional basis. Transit travel and wait times were the top concerns of survey respondents who replaced transit trips with TNC trips. TNC usage takes place in communities of all income levels; and TNC use is associated with decreases in respondents’ vehicle ownership and single-occupancy vehicle trips. The report provides guidance to help inform public transit agencies and other public entities in large, midsized, and smaller urban areas in their attempts to engage with TNC services.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Tables;
  • Pagination: 94p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01674979
  • Record Type: Publication
  • ISBN: 9780309390378
  • Report/Paper Numbers: Project J-11/Task 25
  • Files: TRIS, TRB, ATRI
  • Created Date: Jul 11 2018 11:34AM