Beneath the bustling streets of downtown St. Louis, Missouri, a historic piece of infrastructure is getting a much-needed upgrade. The Union Station Tunnel, originally constructed in 1902 by the Terminal Railroad Association, once served as a vital subway access point for 36 rail lines arriving at the iconic Union Station. Now, more than a century later, the tunnel is being rehabilitated to support modern transit needs while preserving its legacy. The project, led by Bi-State Development and M ... Read more
Deep in the Rocky Mountains, the Eisenhower-Johnson Memorial Tunnel is a crucial transportation corridor connecting Denver and western Colorado. As one of the highest vehicular tunnels in the world--sitting at an elevation of 11,158 feet--it serves as a key passageway through the Continental Divide, allowing commuters, freight, and tourism traffic to flow efficiently between Colorado's urban centers and ski resorts. Given its importance in maintaining year-round accessibility through the rugged ... Read more
