Mike Schagrin, ITS Joint Program Office, RITA, and John Harding, NHTSA, describe US progress towards an in-vehicle Intersection Violation Warning system. In 2008, there were 37,261 fatalities on US roadways. Of these, 7,772, some 20.8 per cent of the total, were defined as intersection crashes or intersection-related crashes. Through a multi-agency research initiative led by the Research and Innovative Technology Administration (RITA), the US Department of Transportation (USDOT) has developed a prototype In