My car fob has never worked in the parking lot near the top of San Bruno Mountain just south of SF. I've assumed the proximity to Radio Peak is the culprit.
Daaaang, that's got to be some power. I've looked at Sutro's architecture from across the bay, but never got up close to see what's on it.
I have a keyless-only car now, and this sort of stuff worries me. "Dead battery" mode has always saved me thus far, but in that situation? I'd be hosed. Can't even put it in neutral and coast down the mountain. (Electronic transmission, there's no shift-interlock bypass...)