Purpose of traffic flow The purpose of traffic control devices, as well as the principles for their use, is to promote the safety and efficiency of highways by allowing the orderly movement of all road users on open streets, highways, bike lanes, and private roads. to the public across the country. . Traffic control devices notify road users of regulations and provide warnings and guidance necessary for the smooth and efficient operation of all elements of the traffic stream in a manner that minimizes the occurrence of accidents. Reduce risk You as a driver legally and responsibly recognize the need for reduced risk driving practices by accepting driving as a privilege with responsibilities, obligations and possible consequences; and apply knowledge and understanding of alcohol and drug awareness; the traffic laws of this state; highway signs, signals and markings that regulate, warn or direct traffic; and problems commonly associated with car accidents, including poor decision-making, risk-taking, drunk driving, distractions, speeding, not wearing a seat belt, driving at night, failure to yield the passage and use of a wireless network. communication device while operating a vehicle.