With all the stress people have in their lives how about a format that features the calming sounds of the ocean, along with the occasional Zamfir track. The voice person could be a laid back, Shakespearean actor, preferably female. Instead of commercial stop sets, they could sell the whole thing to Geico, where every 15 minutes the voice person would say something like, "This 15 minutes of solitude was courtesy of Geico, 15 minutes can save you big bucks on car insurance. Now, more peaceful, calming sounds from Solitude 101.7", or, "We're glad we kept you from shooting the dumb sh*t who cut you off on the interstate, and so is Geico, ranked #1 in brand loyalty. Now relax and enjoy more Solitude 105.5".
If you've ever hit Boston's Southeast Expressway during rush hour I'm sure you see the potential for this.
Just a thought...