Ellen Marie Chequer died in the crash at 1784 East Tamar Highway on March 2, 2019.

A coroner's report into her death was released on Tuesday and found that she died as a result of traumatic injuries.

The crash occurred while Mrs Chequer's husband was driving.

He turned across traffic through a break in the wire rope barrier that separates the two lanes, in order to enter a driveway.

Another car collided with theirs, and sadly, Mrs Chequer died by the time paramedics arrived.

Mr Chequer sustained five broken ribs and spent two weeks in hospital, and the two occupants of the other vehicle suffered bruising and lacerations and spent five days in hospital.

The driver of the other car was going under the speed limit and the report found he could not have avoided the crash.

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Coroner Olivia McTaggart noted that the break in the barrier was located on a long curve and on the crest of the hill.

"There was no holding bay present in the 15.7 metre break in the barrier that permitted a vehicle to wait for oncoming traffic to pass," she said.

"Instead there is only a narrow strip of roadway along the length of the gap which does not enable a vehicle to safely wait whilst attempting to cross.

"A vehicle waiting in this position is at risk of a rear-end collision by a vehicle travelling behind in the overtaking north-bound lanes."

The Department of State Growth intends to close the gap in the barrier between traffic where the crash occurred, the report said.

Ms McTaggart noted that the Director of Public Prosecutions determined not to charge Mr Chequer with causing death by negligent driving.

"In coming to this decision, the director took into account the fact that Mr Chequer had lost his wife, the express wishes of [the occupants of the other vehicle] that he not be charged and the difficulties associated with turning on the highway at that spot," she said.

Ellen Marie Chequer, 75, lived at West Launceston and had four children.