Of course, focusing exclusively on the presence or absence of Open Container laws does not permit a complete understanding of the many issues that contribute to drinking while driving. In particular, many of the states that lacked fully-conforming Open Container laws in 1999 had laws that contained many elements of a law that met the Federal requirements. In addition, some cities and counties in states that lack Open Container laws have their own regulations prohibiting open containers, which contribute to public perceptions that open containers of alcoholic beverages are prohibited on all roads and highways in the state, despite the absence of state Open Container laws. Other factors that may contribute include other state laws currently in effect and the level of enforcement and publicity dedicated to state and local laws.