Result of trip:
I never was able to use the aforementioned preferred intersection or addresses for final destination. I realize this was exacerbated by weak to no signal there.
I believe Verizon users mostly have signal through that area, but AT&T was pretty useless between Wadsworth and the gate entrance to Black Rock City. Along that entire considerable stretch of road, I probably had AT&T signal for two five mile stretches, if that much.
Perhaps until the day cell coverage improves through that desolate route, this is as good as Waze can do here! It's an unfortunate limitation, being that 70,000 people commute to that location and must navigate massive traffic clogs, police checkpoints and traps.
Please let me know if there is anything this Wazer might do to improve the situation.