This is Amazing
If, that is, it really works.

The Alaris Media Network "intends to deduce demographic information from the radio stations drivers are listening to and then display advertising aimed at them based on income, sex, race and buying habit data. He said the idea was not to single out individuals, but drivers en masse," reports the New York Times. For instance, if a preponderance of rush-hour drivers are tuned to a radio station known to have affluent or educated listeners, then the advertisements at that time would be aimed at them."