Over the years AM radio, has become more and more technologically obsolescent, I think. To begin with, the system of regulation could not foresee that there would be such a demand for spectrum space for everything from nursery monitors to public safety radio. International agreements and adjacent- and co-channel protection considerations certainly don't help, either. Daytime signals have been further degraded by the sheer volume of electromagnetic clutter - pollution, if you will. Electric utilities are not required to filter their transmission lines as they once were; in short, the signals simply cannot punch through and go as far as we remember in the not-so-distant past. Broadcasters are using FM translators to hopefully fill in gaps in areas where they believe potential audiences are to be found. A few years ago, the government mandated a total transition to digital television: On Date Certain, analog television broadcasting ceased to exist, and save for a few exceptions, millions of television sets were suddenly obsolete. This is inevitable for radio as well; in fact, if it were not for all of those radios in all of those cars, this transition would have surely occurred by now. As happened with digital television, the government could totally recast the radio industry in a way which cannot occur otherwise. Output powers could be reduced, for example, and directional antenna systems could be mandated so that we would see more stations operating on fewer frequencies with fairly standard coverage areas throughout the system. Cell phone companies do this as a matter of routine business today. AM radio today is essentially the same system begun about a century ago. Were the FCC to mandate a cessation of AM broadcasting on, say, January 1, 2020; most of the stations would go dark before that date, I believe. In reality local AM radio - that is, the 1-kw stations which serve towns outside those large metropolitan centers - is virtually extinct now. I see the AM band being given over to other uses - mostly low-power, limited range, utilitarian uses - while the FM band is transitioned to digital signals. If my vision of more stations is correct, stations will serve smaller audiences with more finely tuned programming: Broadcasting will become less broad, so to speak. Eventually, I think we will even see radio programming sold much like cable or satellite programming is sold today. Listeners subscribe to the stations they want, and a digital code on a smart card will be plugged into a slot on the back of the receiver to unlock the stations purchased. This is already being done, just not over the air on the so-called free radio bands. Eventually, the over-the air signals will disappear altogether, in fact. AM radio will be the first to go.