DEN_BCV - Denver International Airport to Beaver Creek
DEN_BRECK - Denver International Airport to Breckenridge
DEN_COP - Denver International Airport to Copper Mountain
The visualization reflects data directly from the GTFS feed. Route paths, stops, colors, and labels are all derived from the feed files (routes.txt, trips.txt, stop_times.txt, stops.txt, and shapes.txt where it's defined). If a route doesn't specify a color, it appears in black. When multiple shapes exist for different trips on the same route, they're combined into one for display.