More than likely you are listening to a Low Band to UHF cross band link. In the licenses noted above the UHF frequencies are listed as FX1 (Control Station) and FX2 (Fixed Relay), the UHF channels are not licensed for Mobile units.
We have a cross band link in Westchester County. It is a link between the NYSDOT Yard and the transmitter tower. Both ends have Yagi directional antennas, so it is monitorable only in the local area.
I see that WNFG794 license is over 20 years old. Many years ago the NYDOT got the idea of replacing their remote transmitter site leased lines with UHF links. Equipment was purchased but much of it was never installed at least in my area.
One particularly ridiculous case I was aware of was the tower was in the maintenance yard right behind the Residency dispatch office and there was an exiting on site wire line control (not a telco leased circuit so not recurring cost) to the tower. So the UHF link equipment was purchased but never installed.
It was about in the same era NYSDOT got the ridiculous idea of eliminating skip interference by by offsetting their Low Band frequencies by 10kHz to "new" frequencies between the exiting 20kHz channels. With 20kHz wide signals, this would have traded single co-channel interference for interference from 2 adjacent channels with signals still well within the RX bandwidth. I believe the FCC actually granted some licenses, over the strong objections of the frequency coordinators and other states, but eventually cooler heads prevailed and it was never implemented AFAIK.
