It's a rural road that is only paved for a few miles and then turns to gravel, so not likely a well-used road north of 190th. Only the people living on the couple farms north of there (less than 10, I think before the next paved cross-street) would drive past it, probably once, in the morning, assuming they went to work to the south.
And if I saw a truck sitting there as I drove by, I'd assume they either had already called for help, or was broken down and left with someone to get help. Everyone has cell phones and people assume trucks have CBs, too. I don't think I'd ever "call in" a truck, unless I saw it there fr an unusual amount of time and I noticed it had live animals in it. By 3p, I don't think anyone would likely have driven by it twice that day.