Colorado’s ambitious plan to build a futuristic transportation system that would sling travelers along the Front Range and into the mountains in minutes also comes with an ambitious price tag: $24 billion. In the state’s proposed route, named one of 10 global finalists this month by the Los Angeles-based Hyperloop One, the Rocky Mountain Hyperloop team gave that estimate for the 360 miles connecting Denver to Pueblo, Vail and Cheyenne.