"The Drive" doesn't make much sense for DC, does it? I know in Chicago there's a Classic Rock station called The Drive, which I think refers to Lakeshore Drive, a fancy boulevard of apartment buildings along the Lake Michigan waterfront. But the new DC Drive will not be doing Classic Rock. WBIG already has that covered. So maybe it's Classic Hits, since CBS/Entercom have so many stations around the U.S. in this format, WCBS-FM NYC, KRTH LA, WOGL Philly, KLUV Dallas, WOMC Detroit, KOOL Phoenix, KXSN San Diego, all of them doing very well in the ratings.
Of course, owners sometimes shy away from Classic Hits since it skews older. However, if the ratings are good, then they are good across the board. Often WCBS-FM NYC is in the top 5 in 25-54, 18-49... even surprisingly top 10 18-34.
I still have to think, if CBS had only put its All-News format on this FM station, with great coverage of the entire D.C. metro area, it could have competed with WTOP. Instead, it went on 99.1, halfway between Washington & Baltimore, but not really covering either market adequately. All-News is expensive but if it had taken just some of the crazy money WTOP makes, it would have been a success.