Jeremy Dobbe, 36, entered the plea Monday in the death of 47-year-old Joyce Meeks. In exchange for the plea, the state agreed not to file additional charges.
Dobbe was part of an inmate driver program which shuttled other inmates to their work release programs. He was seen speeding and swerving in the state-owned van before he struck Meeks' minivan on June 25 in Lincoln. The driver program has since been discontinued.
Dobbe faces up to 20 years in prison when he is sentenced in June.