I've been close to Webster, MA many times, but have never been in it. I know it's on I-395 at the Connecticut border. I had this station on with an old Panasonic AM/FM/CD "Walkman" when leaving the Worcester bus/train terminal, heading west (south?) down I-290 and then back to I-90 on New Year's night. The signal got stepped on by WSRS-FM 96.1 in the area of the Polar headquarters and the Auburn town line. They were solid for much of my time on I-90 between Exit 10 in Auburn and Exit 9 in Sturbridge. It was fine for much of the ride on I-84 West to the CT line. It was so-so to about the Ashford/Willington, CT town line. That's when WPLR-FM 99.1 of New Haven caused a bit of interference.
I definitely noticed an older country song or two mixed in. Was this station being fed via satellite with a local ad simply thrown in?