An Exploration of Transit's Market Share and the Public Policies That Influence It. State and local transportation officials constitute the primary intended audience for this report. This includes elected and appointed board members who deal with local transportation policy, transit agency officials, transit agency professionals, and metropolitan area transportation planners. The report addresses transit's ridership and its share of the travel market. The research explored a variety of different public policies and transit management actions that can potentially influence transit ridership, particularly in comparison to local travel by private vehicle. The policies are presented through case studies, which are summarized in the report and documented in greater detail in the accompanying appendices.