The underground line will link the Gold Line in Little Tokyo with the Expo and Blue lines, which currently terminate at Flower and 7th Street. The connector will have three new stations: 1st Street and Central Avenue, 2nd Street and Broadway, and 2nd and Hope streets. LACTMA forecasts initial weekday ridership of around 60,000.

The project will reconfigure the three existing LRT lines into two lines, one running north-south and the other east-west, and for many passengers it will eliminate the need to make more than one change between light rail and the metro Red and Purple lines.

Construction work will start immediately and the link is due to be completed in October 2020.