Natural Gas as a Transportation Fuel: Models for Developing Fueling Infrastructure is written to enable local distribution companies (LDCs), and other stakeholders, to better understand the commercial and regulatory considerations involved in entering the NGV refueling market. The study outlines a variety of models that may be employed; recognizing that approaches to this market will vary based on the needs and policy goals of individual regulated service territories. Attention is given to past practices, innovative approaches, and the current and near-term environment that recognizes the important role LDCs will play in establishing natural gas as a mainstream transportation fuel.