Re: Great timing...
It is weird, but unfortunately it's (IME) the only option. I drive from Glasgow to Edinburgh every morning (when not on lockdown) and BBC Scotland's Good Morning Scotland travel reports are the best available (low hurdle to clear admittedly). The "local" stations are Radio Clyde and Radio Forth, who only ever seem to report on traffic issues actually in either Glasgow or Edinburgh respectively and not anywhere in between.
That said, I did recently have a courtesy car as someone ran in to the back of me on the M8, and got good reception of Planet Rock on DAB all the way along the M8. Which was nice.