A radio-listening FrontBurnervian suggests the radio traffic hottie in question is WBAP’s Laura Houston, pictured here. Another pseudo-memory-having FrontBurnervian writes:

Heard her only one on JACK-FM a couple of years ago. Her name was Johnson and her voice went straight…Or maybe I dreamed the whole thing.

I’ve heard back from Sarah, so I know the right answer. (I also know the “male friend” in question, but that’s not what we’re interested in here.) Any more guesses? I’ll give you a hint. The traffic hottie in question no longer does traffic.