The next administration can achieve significant reductions in greenhouse-gas emissions by helping transition the commercial truck and bus industries to cleaner fuels like electric power and hydrogen. A key role for the Federal Government is to support the build-out of a nationwide network of zero-emission (i.e., alternative) fueling stations, including electric charging and hydrogen fueling stations. Achieving this goal will require federal leadership and significant collaboration with Congress, states, electric utilities, the private sector, and others. The amount of effort and time necessary for this effort means that it must be a day one priority to achieve meaningful progress within four years. A robust network of zero-emission fueling stations for trucks and buses will facilitate a significant and permanent reduction in greenhouse-gas emissions, improve air quality for communities nationwide, result in safer highways, and help create of hundreds of thousands of new jobs.