Library technician Margaret Teresa Keyte became trapped in her car when t-boned by Arnold Uraga Corpuz on Wynnum Road on March 24 last year and died at the scene.

Corpuz pleaded guilty to the dangerous operation of a vehicle causing death during sentencing before the District Court in Brisbane on Wednesday, where he told the 56-year-old's family he was sorry for what he'd done.

"If I could trade places with Mrs Keyte, I would in an instant," Corpuz said.

"I hope one day that the Keyte family will forgive me. I'm truly sorry for your loss."

Traces of drugs taken the night before were found in his system and he was travelling between 123km/h and 130km/h when he hit the brakes.

The 24-year-old admitted responsibility immediately and returned to the scene a week later to lay flowers and a card.

He has prior convictions for speeding and driving under the influence of alcohol and was convicted for speeding in a separate incident after the crash that killed Ms Keyte.

The emotional turmoil suffered by her relatives was revealed in victim impact statements shared with the court.

David Keyte spoke of the love and admiration he had for his wife, her achievements and the mark she had left behind.

"I miss her every day and long to hold her in my arms again," his statement read.

"Margaret Teresa Keyte was, and always will be, the love of my life."

One of the couple's daughters, Anne Marie Fabriek, said she continues to find drawings and letters her young children wrote to her mother, who she described as her whole world.

"How can I be a parent to my girls when my role model is gone?" she said.

"I hate the fact that when grandparents day comes around at school, that she's not there to be with my kids."

Corpuz was remanded in custody until his sentence on July 17.

Australian Associated Press