The Arizona Department of Transportation is implementing an Advanced Traffic Management System Freeway Management System (FMS) for 99 miles of their freeway network. The first project containing 29 miles has been under construction since March 1993. The system will include a vehicle detection system to electronically identify incidents. Management of the incidents will be accomplished with Model 179 ramp metering controllers and fiber optic variable message signs. The field equipment will be interconnected with a fiber optic communications system to a RISC, UNIX based computer system. A new 18,000 square foot control center will house the central equipment and operators. Multiple procurement contracts for the computer equipment and variable message signs have been executed. Kimley-Horn and Associates will serve as the system manager to integrate and test the fust phase of the ATMS which is to be operational in 1995.