A motorist who was killed after he drove the wrong direction for 30km on the Sligo to Dublin dual carriageway had toxic levels of methamphetamines and cannabis in his system an inquest has been told.

Westmeath Coroner, Raymond Mahon, returned a verdict of misadventure after he was told that a Polish man, who had lived here for more than 15-years, had made several efforts to avoid a collision while driving westward in the passing lane of the east bound dual carriageway on 27 May 2018. 

Gardaí received reports from up to 100 motorists that Thomasz Krupa, with an address at Tinahely in Co Wicklow had been driving his Honda car in the wrong direction on the motorway after he left the Applegreen filling station near Enfield in Co Meath.

He drove for 30km towards Mullingar while dozens of motorists who were travelling towards Dublin tried to avoid him. 

When his car finally collided with another vehicle the Honda was flipped into the air and Mr Krupa was declared dead at the scene. 

Several other people were injured in the collision, including one motorist with a fractured leg, but all other injuries were minor.

Before the inquest into the man's death concluded this afternoon in Mullingar a pathologist at Mullingar hospital said that the levels of methamphetamines and cannabis were discovered to be at or above toxic levels in the driver's blood and urine when a post mortem was carried out on his body.

The pathologist said that motorists with these levels drugs in their system had been associated previously with erratic driving.