And on the other side...
Let's say that Sarah drove over something very important in the road that they'd spent the last day or night prepping, or she'd gotten in the way of a very important maneuver that was likely to put either herself or her car in jeopardy. I'm thinking something like a crane about to drop a load or whatever. Perhaps the guy had had numerous people drive the wrong way into a clearly coned off area, and it was just bad luck that Sarah actually stopped and got the brunt of his irritation at the complete lack of awareness from some drivers. We've only got one side of the story here. Perhaps the guy wasn't as aggressive as the OP says, maybe more sarcastic, or maybe Sarah made her comment in a bit more of a flippant way.
I'm not saying anything like that happened, and I dare say the original story is probably bang on the truth, but all it was was a few harsh words from a bloke in a hi-vis. I wouldn't particularly let it ruin my week, and I'd just stew on it a bit and then carry on with life. I certainly wouldn't bother complaining about it. Next time it happens give as good as you get back, my missus certainly does.