Colorado Railways Under Construction — Active Rail Build Projects and Line Extensions

Colorado railways currently under construction. New rail routes, line extensions and infrastructure upgrades — active build projects across the network.

Colorado railway lines currently under active construction: new routes, extensions to existing lines and major rail infrastructure upgrades. Includes new high-speed corridors, electrification projects, double-tracking schemes and regional line extensions. Data tagged by OpenStreetMap contributors on the ground, reflecting what is physically being built on the railway network.