This study will update the information contained in the AASHTO Roadside Design Guide (RDG) based on research conducted over the past 4-6 years. The AASHTO Technical Committee on Roadside Safety approved the updated version of the RDG at its September 2010 meeting. The RDG has been submitted for AASHTO balloting and the project is completed. (NCHRP Staff: C. W. Niessner)