MARICOPA, Ariz. — The Arizona Department of Transportation has selected its final design for improving the State Route 347 intersection at Riggs Road. The route between Maricopa and Chandler has long been the location of multiple deadly crashes and traffic congestion for commuters. Between 2017 and 2022, over 950 traffic crashes were reported on the stretch of SR-347 between Maricopa and Interstate 10…