Heidi Marie O'Neill, who had methylamphetamine in her system, was driving a white Peugeot wagon when she hit Winton Wells as he was walking across Sturt Street about 11.45am on May 9, 2018.

The Peugeot pushed Mr Wells' body 10.7 metres before he was thrown from the front of the car and landing a further 2.8 metres away.

A reconstruction of the collision scene found O'Neill was travelling between 40 and 48km/h at the time of the collision.

The 37-year-old, who held a full driver's licence, was doing the banking for her work when the collision occurred. She told police she did not see Mr Wells crossing the road and he "just appeared".

O'Neill told police she had snorted a quarter to half a point of methylamphetamine the night before the collision. She said she used the drug to help her with autoimmune disease, lupus.

O'Neill told police she had nerve problems in her left leg, moving around and taking methylamphetamine helped her cope with pain. She also said methylamphetamine helped in keeping her awake because she often so tired from being in pain.

On the morning of the collision, Mr Wells drove with a friend from Ararat to Ballarat where he had an eye appointment at Kevin Paisley Fashion Eyewear.

After his appointment Mr Wells was crossing Sturt Street from south to north when O'Neill collided with him in the right-hand lane.

Ambulance officers arrived within a few minutes and conveyed Mr Wells to the Ballarat Base Hospital with life threatening injuries.

Later the same day an air ambulance transported him to the Royal Melbourne Hospital. He died at the hospital on May 29, 2018.

O'Neill pleaded guilty to dangerous driving causing death and exceeding a prescribed concentration of drugs at the Victorian County Court on Tuesday.

Judge Liz Gaynor will sentence her on May 18 in Melbourne.

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