New tracks will be constructed from the southern end of the terminal station over a highway to provide a second connection from the station to the rail network. Additional platforms will be built, the pedestrian passage beneath the tracks will be expanded, and escalators and lifts will be installed.

Converting Union station into a through station will increase capacity, cut Santa Barbara - Los Angeles - San Diego Amtrak journey times by reducing dwell times at Union station, allow new cross-LA Metrolink commuter rail services to be introduced, and eventually facilitate the introduction of high-speed services.

The three organisations will now set up a Link US Executive Steering Committee to oversee the project.

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