A new generation of locomotives for a changing world: greener, cleaner, and just as powerful. This book introduces readers to General Electric's Evolution Series, the company’s latest achievement in a long and distinguished history of locomotive design.At the heart of the Evolution's success is the GEVO 12-cylinder engine, which produces the same horsepower as the old 16-cylinder FDL while using less fuel and reducing emissions. Today’s most up-to-date railfans will want to read about the development, testing, production, and use of the locomotive that, in its first year of production, has already been ordered by every Class 1 railroad in North America.Photographs and illustrations document the features and components of the Evolutions operating across the country, and interviews with GE and railroad personnel fill in the details of current operations and plans for what is certain to be the future of American rail.