The project included the construction of 2.2 miles of High Occupancy Vehicle (HOV) lanes, one lane in each direction of travel along I-5 between Magnolia Avenue and Cohasset Street undercrossing, the modification of the Empire Avenue interchange to a full diamond interchange, the realignment and elevation of the railroad adjacent to the freeway, and a railroad grade separated crossing at Buena Vista Street. In addition, the Burbank Blvd overcrossing was reconstructed with part of the freeway re-aligned and the Burbank Blvd on and off-ramps modified.