The Denver Union Station project in the US state of Colorado will receive $300m in federal loans, according to Transportation Secretary Ray LaHood.
The project involves the building of a light rail terminal consisting three tracks and two platforms.
It will also include an intercity and commuter rail facility made up of eight tracks and platforms.
Other project works include the extension of the shuttle service, accommodation of the downtown circulator service and pedestrian improvements.
The multimodal transportation project, scheduled to be completed in four years, is intended to reduce traffic congestion and promote transportation mobility.