Many residents of Union and Essex Counties in New Jersey fondly recall the whistles of the Rahway Valley Railroad trains that rolled through the picturesque stations of Roselle Park, Kenilworth, Union, Springfield, and Summit. The Rahway's steam and diesel locomotives supported local commerce, provided passenger service, and carried a vast array of goods to and from local businesses. It connected the area with larger railroads, such as the Central Railroad of New Jersey, the Lehigh Valley, and the Delaware, Lackawanna and Western. One of the shortest yet most prosperous of American railroads,...