Van driver Matthew Tvrdon has admitted at Cardiff Crown Court that he killed mother-of-three Karina Menzies in a 'hit-and-run' incident in the Welsh capital last October.
He pleaded not guilty to her murder, but admitted her manslaughter on the grounds of diminished responsibility.
The 31-year-old died following the incident in the Ely area of Cardiff on October 19.
At Cardiff Crown Court today, Matthew Tvrdon also pleaded guilty to seven separate charges of attempted murder.
He went on to plead guilty to two counts of causing grievous bodily harm (GBH) with intent and two of attempting to cause GBH with intent.
He also admitted four counts of actual bodily harm with intent and a single count of dangerous driving.
The 32-year-old appeared via videolink at Cardiff Crown Court from Ashworth high security psychiatric hospital in Maghull, Merseyside.
The guilty pleas today follow a series of behind-the-scenes conferences between the prosecution and defence lawyers.
Ian Murphy QC, prosecuting, said: "There are so many complexities to this case. It is important that those victims who want to be consulted are consulted."
Judge Mr Justice Wyn Williams adjourned proceedings to June 5 pending the outcome of consultations with the victims.