I know I've got a few truckers, ex-truckers, and general road-trippers reading here. I need your help.
I'm pulling a trailer from (metro) Phoenix to Norman, Oklahoma.
In the interest of not only gas mileage, but wear and tear on my van, I'm trying to find the least steep way uphill to get from here to I-40.
up AZ87, though Payson, and then along
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