NCDOT Project 2009-03 FHWA/NC/2009-03 January 2015 Performance Improvement from Deep Layers of Subgrade Stabilization Vincent O. Ogunro, PhD, principal Investigator Miguel A. Pando, PhD, Kay Researcher Rajaram Janardhanam, PhD, Key Researcher Arezou Eslaminejad, Graduate Research Assistant Yogesh Y. Parkhi, Graduate Research Assistant Brian J. Weyer, Graduate Research Assistant Department of Civil and Environmental Engineering University of North Carolina at Charlotte 9201 University City Boulevard Charlotte, NC 28223