Jury trial is mostly used in the United States and in Canada. There are few other countries that require juries for trials. Depending on the common law of the land, jury trials are allowed for the different cases such as incidents involving drunk driving that go to court.
The Arizona Legislature has approved a bill wherein DUI defendants will no longer get a jury trial for their first offense (KPHO 04/22/2011). Having a jury trial was a flat right of DUI defendants before the approval of this bill.
With this, the judge will be the one to decide whether to approve a request for jury trial or for the judge to hear the case. The bill also gives judges new discretion on sentencing these offenders.