Manning designed the six passenger stations for DART’s Orange Line extension. Additionally, the firm coordinated public art and neighborhood components into the designs. The passenger stations are the most publicly visible part of the light rail system, and the projects entailed developing designs meant to engage riders while meeting the exacting standards of the client and the engineering system requirements of the line.

The extension addresses the needs of the growing residential and commercial populations of Irving, Texas and connects them to the extensive Dallas Area Rapid Transit network of light rail service. The extension serves 12,500 riders daily and contributes to a system-wide total increased daily ridership of 33,000 people. The extension of the Orange Line also provided a much needed connection from the downtown area to the Dallas/Fort Worth International Airport, making DART the largest light-rail operator in the United States, with 90 miles of track.