The natural gas in the Marcellus Shale represents one of the largest energy reserves in the world. This clean-burning resource provides a unique opportunity for the transportation sector to move toward a lower-cost, lower-emission and domestic energy resource to meet our transportation needs in an economically and environmentally responsible manner. The Marcellus Shale Coalition (MSC) was organized by Industry leaders to promote the responsible development of natural gas, and to share best practices while working with, policymakers, business leaders and community partners to promote this use of locally produced natural gas as a transportation fuel. This NGV Roadmap for Pennsylvania Jobs, Energy Security and Clean Air report provides a roadmap for how such a transition can begin to take place.