PC Mark Dempster of the collision investigation unit told the hearing there was no evidence of ice on the road:
"To move a wagon of this size across the road would require a large piece of ice- in the nine minutes it took the emergency services to arrive that ice would still be visible"
"On the balance of probability as to why Mr McQueen failed to negotiate the left hand kink it is possible he became distracted."
More top news
A 34-year-old man has been jailed for 16 months, for possessing the most serious class of child porn - with some victims aged two-years-old.
A family from Dumfries say their lives have been turned upside down due to a number of failings made by staff in Ward 7 at DGRI.
Sunshine and showers on Saturday, occasionally heavy with thunder. Better day Sunday