Legana's Rowyn Jake Johnson was drunk, speeding before fatal Launceston crash

Rowyn Jake Johnson, of Legana, was drunk and speeding when he crashed at the corner of Paterson and Wellington streets on August 2 last year.

Mr Johnson uploaded eight videos from his GoPro under the name Ridiculously Adventurous Dad which showed him riding at speeds of up to 260km/h on northern Tasmanian roads.

He posted his last video less than 24 hours before his death.

Coroner Andrew McKee said: "I wish to comment that this crash would not have occurred had Mr Johnson been riding his motorcycle in an appropriate and lawful manner".

"This case is a further example of the consequences that flow from an individual's decision to drive a motor cycle at high speed and in a dangerous manner.

"I note that he showed little regard for the road rules of this state and drove his motorcycle in a manner which posed significant risk to himself and other members of the community."

The unlicensed Mr Johnson, a father of four children, had a blood alcohol reading of 0.174 and had run a red light at 99km/h and crashed into a Suzuki Swift.

He had travelled to Deloraine on the evening of Saturday August 1 to see his brother who recalled that he had trouble riding his black 2010 Kawasaki Z1000 SX motorcycle and appeared to be affected by alcohol.

Despite his brother advising him not to ride Mr Johnson went to meet a friend at Longford.

He had two drinks before heading into the Commercial Hotel in Cimitiere Street in Launceston.

His friend rode as a pillion passenger.

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"[His friend] indicated that at times Mr Johnson rode the motorcycle at speeds of between 150km/h and 160km/h," Mr McKee said.

Mr Johnson left the hotel and rode in an irresponsible manner through various streets of the Launceston CBD, which was recorded by his GoPro, police body worn camera footage and CCTV footage from business premises.

Mr McKee said Mr Johnson rode through the Wellington and Paterson streets intersection at 99km/h against a red light.

His motorcycle collided with the front driver's side of the Suzuki Swift, which was proceeding legally through a green light.

"The impact caused [the Swift] to rotate counter clockwise and travel 7.7 metres from point of impact before impacting a traffic light pole on the south western corner before coming to rest," Mr McKee said.

"The impact caused the motorcycle to become airborne and rotate sideways around its length.

"The motorcycle travelled 12.3 metres in a south westerly direction colliding with a stone fence before bouncing back to the location it came to rest.

"Mr Johnson was thrown over the front of the Suzuki ... then collided with the traffic light pole in the south west corner of the intersection.

"Mr Johnson's helmet and clothing came loose due to the force of the impact."

He was declared deceased at the scene by emergency services personnel.

Mr McKee accepted the findings of the crash investigation by First Class Constable Nigel Housego who wrote: "It is my opinion that this fatal crash has occurred due to reasons that can only be attributed to Mr Johnson".

First Class Constable Housego's investigation revealed that the intersection had been the scene of 68 collisions over the past 20 years, but was generally a safe intersection.

Mr McKee said Mr Johnson's YouTube channel featured footage of him riding at speeds of up to 260km/h, overtaking vehicles on the left, between vehicles and "even passing ride warning signs at speeds of 140km/h".

Mr Johnson was a former Australian Army member who was working as a contract carpet layer at the time of his death.

He separated from his partner shortly before his death.

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