Visit court

Require that she find and attend a court trial for vehicular manslaughtervehicular manslaughter.

Doing 46 MPH in a 20 MPH residential street is truly a life-threatening act. As others said, the punishment should fit the crime. She barely avoided being the subject of such a trial herself. Witnessing a trial may bring home the reality of what she was risking.

And seeing a real trial is a good education for most any teenager, anyways. All the more educational in this particular case.