There's one thing I'd like to say, and it deals with your question on education. One of the most effective pieces of education has been around RBT. It kind of works with the three things working together. You go out and tell the public that the police now have this authorization. You publicly educate people. You have the police very visible. They do a lot of sobriety checkpoints and things like that. Then the numbers drop: the fatalities drop, the serious injuries drop, and the number of people charged with impaired driving drops rapidly.
Using education in the proper sequence can make it very effective, with enforcement, with legislative changes.