 The Pony Express National Historic Trail stretches across Nebraska from near Fairbury, NE north to the Platte River then west along the river to Wyoming with a detour near Julesburg.Responsibility for general improvements to roads mostly fell to the counties of Nebraska.In 1926, the Nebraska Bureau of Roads and Bridges began erecting route markers along highways, the first of which contained the famous covered wagon emblem, developed by State Engineer Robert Cochran, that is still in use today.