Union Pacific's Big Boy No. 4014 Continues Historic Tour with Modern Support
Union Pacific's Big Boy No. 4014, the world's largest operating steam locomotive, is on a historic coast-to-coast tour. Despite being fully functional, the steam locomotive is often accompanied by modern diesel engines. These diesels provide dynamic braking, assist with switching operations, and extend the locomotive's range by refilling water supplies. The tour showcases Union Pacific's commemorative locomotives, celebrating historical milestones and figures. The presence of diesels ensures the efficient operation of Big Boy, allowing it to continue inspiring a new generation of railroad enthusiasts. 
