@ Theatre of Your Mind -- Perhaps a bit off-topic, but maybe of marginal interest :
One night I was driving north on that stretch of the Jersey Tpk you referenced. North Bergen, Ridgefield ........
The AM dial was an upside-down, inside out, clashing cacophony of whistles amd images and mixing spurs that was so horrific at one point that the racket completely turned WFAN silent for a quarter-mile. No audio on 660 at all.
I GTFOed from there fast, before I looked at my hands on the steering wheel to see if their bones were visible.
I never tried tuning 660 in that area but 880 from the same tower nearly disappears for me around there. There's either a null in the signal pattern coming from High Island, or the stronger AM signals coming from the NJ meadowlands are enough to overwhelm people's radios along that stretch. Maybe it's a combination of both.