The National Highway Traffic Safety Administration (NHTSA) is sponsoring research through the Crash Warning Interface Metrics (CWIM) program, in order to develop effective evaluation methods for in-vehicle safety warning systems. The research supports the development of IntelliDriveSM technologies, which use vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication systems to issue warnings of upcoming road hazards or risky driver actions (i.e. lane departure). Westat, Inc. is leading an effort to develop driver-vehicle interface guidance to ensure proper integration of interfaces when several warning systems are installed. Through this project, WTI will provide support to the overall effort by conducting the tasks related to literature review, gap identification, and research plan development. WTI will provide support on additional tasks as needed.