This $109 million design-build project involved the construction of the south half of the interchange between U.S. 281 and LP 1604 in northern San Antonio, Texas. It included four direct connectors, widening of numerous existing under and overpasses on Loop 1604, pavements, pavement resurfacing including a stone matrix asphalt overlay of the mainlanes, storm drainage system expansion, water treatment ponds, traffic signals, ITS, signing, illumination, and pavement markings. Construction began in March 2011 and all four direct connectors were opened to traffic by December 21, 2012. This is the first design/build project executed by the Alamo Regional Mobility Authority (RMA). Rone provided construction materials testing on this project.