The relationship between architecture of high-grade highway Integrated Management System(IMS) and the national ITS architecture is researched.The users of IMS including drivers,passengers,pedestrians,the management department of highway,the maintenance department,the traffic management department,the police,the fire department,the emergency care center,the government and the planning department are defined.The IMS architecture is divided into six functional areas,i.e.,traffic control,emergency management,to...