you know, I know exactly how your daughter felt, where I am now in ABerdeenshire I very rarely go on the road with my boys but have to watch in the forest for timber trucks although they do travel at 15 mph, some of them.
But, when I was downsouth in Cheshire, well, I had to take my life in my hands everytime I went out and they were fairly rural roads, why people think its great to rev up I dont know, another bugbear was people who would slow behind you, yes thank you very much thats really kind, hang behind you til they HAD to drop the gear then change as they accelerated to go passed, sometimes I think its better to slow, give plenty of room and keep going if traffic allows.
Biggest bugbear? Driving my single along the road, people slow behind, overtake, then go to pull in in front of the carriage, hang on! Theres a horse in front of that! The amount of times Odinn has actually lifted his head so not to get clobbered, probably due to the windrush going under his blinkers but, not nice.
Hope your daughter and brood are ok after their experience.