my best guess is that it might have something to do with children fighting in the back
Actually, it wasn’t women in that age group. The two worst groups were under 20 and over 76.
With older women (the 76+ age group), I’d suspect it’s because a lot of them probably didn’t start serious driving until their husbands died or became incapacitated, and they’re just not very experienced or good drivers and tend to panic.
With teenage girls, they’re probably not paying attention.
High heels!