Put it down to bitter experience and forget it because, if the engineering of the road was fundamentally wrong with a history of accidents even a fraction as bad as you suggest, it would have been re-engineered by now, and mud on the road is a hazard that a competent driver is expected to anticipate on country roads.
The government are running a big radio campaign right now warning about the dangers on country roads, in which they specifically warn about skidding, slow-moving vehicles and livestock on the road.