The Rail Transportation Program is participating in a multidisciplinary and multinational research project funded by the National Science Foundation (NSF). The project concentrates on the sustainability challenges of one form of bioenergy--liquid transportation fuels or “biofuels”. Specifically, the project investigates “the impacts of biofuel development on socio-ecological systems and associated ecosystem services, and how can those impacts best be measured, modeled, and mitigated?” RTP will work on investigations related to transportation logistics, including development of indicators to compare transportation systems based on the availability of modal and multimodal transportation alternatives and identification of case studies with different feedstock types, climate, transportation infrastructure, and ownership structures.