Run off gathers where it settles. Where the hell did I say "3ft of water running down a hill"???????????
So why not pull over? Some of those areas run uphill, why not pull into one?
You say it gathers where it settles so how many floods did you drive through? Either you drove through many or you couldn't be arsed to stop and decided to plough on in a car stuck in 1st gear with no lights.
What happens if someone coming the other way decided to do an overtake and ploughed into you head on at 60+ as they couldn't see you trundling along with no lights on until it was too late?
None of this makes any sense to me.