The Mail Online reported that Soutar, 50, was cleared of causing death by dangerous driving and death by careless driving at Newcastle Crown Court yesterday.
The victim, Nigel Sowerby, 37, from Cleckheaton in West Yorkshire was airlifted to Newcastle’s Royal Victoria Infirmary but died from his injuries.
Soutar said he had must have been having a “micro sleep” caused by sleep apnoea condition which was undiagnosed at the time of the collision.
The Mail reported that Soutar underwent tests after the incident which revealed he had the sleeping condition.
During the trial a sleep specialist, Dr Tom Mackay, said he first saw Soutar in January 2013 and said he diagnosed him with sleep apnea in April 2013.
The condition can lead to micro-sleeps, which can last from fragments of a second to about ten seconds which Soutar said caused him to drift into oncoming traffic.
The accident took place on the A1 Felton bypass in Northumberland at 7.30am on 12 November 2012.