RSG Director, Steve Lawson, and Senior Analyst Brett Kiser will present their paper, “Sustainable Transportation for National Parks: Evaluating the Long-Term Sustainability of Shuttle Service in Mount Rainier National Park.” This paper presents the results of a study in Mount Rainier National Park to assess the long-term sustainability of shuttle service options, not only in terms of operational requirements and financial feasibility, but in terms of crowding-related capacities for visitor destinations serviced by the shuttle system. Limitations and benefits of the approach are considered for planning sustainable shuttle systems in national parks.