Rich Wood wrote:

I also doubt a full-time traffic and weather station would be
economically viable even in New York or Los Angeles.

There was one in LA about 9-10 years ago: KTRK-1650 or something like
that. (One of Saul Levine's experiments?) Didn't last particularly
long, probably because no-one listened to it all day, they just listened
for their particular area/trip and then tuned to another station
for music, news or whatever....