Greenway Plaza is a master-planned mixed-use development off Interstate 69/U.S. Highway 59 in Houston, Texas, United States, five miles (8 kilometers) west of Downtown Houston and three miles (5 kilometers) east of Uptown Houston. Greenway Plaza is Houston's first totally planned business-commercial-residential complex developed by Kenneth Schnitzer. Greenway Plaza is owned and operated by Cousins Properties. Most buildings within the Greenway Plaza campus are interconnected by environmentally-controlled bridges, and/or tunnels and covered walkways. Civil engineer Jack Boyd Buckley also worked on the Greenway Plaza design.