Man's fatal lorry smash.
The accident happened after a heavy goods vehicle had broken down in the middle of a steep unlit embankment, blocking the road, an inquest heard.
Driver Kenneth Longhorne's van careered into the back of the articulated lorry on the A68 at Allensford Bank near Consett on September 28 last year. He suffered massive head injuries and damage to his lungs.
The driver of the lorry was not seriously hurt.
It remains unexplained why Mr Longhorne, of Willington, County Durham, failed to stop.
The 43-year-old non-drinker was known to suffer from debilitating headaches and had earlier complained of a bad headache to colleagues.
Recording a verdict of accidental death, coroner David Mitford said: "He may simply have lost concentration, possibly because he didn't feel well."