This report documents design, development and testing of strategies for control of traffic within an urban freeway corridor, the Dallas, Texas, North Central Expressway Corridor. A multilevel control strategy was developed for four primary elements of the study: Freeway, frontage roads, arterial streets, and driver information. A hardware system design was developed and a central computer and minicomputer system for corridor control was implemented. The control strategies for each of the four subsystems may act independently or may be linked together for intergrated control.