City officials, who are allocating $130 million over four years to the project, said their goal was to break the revolving door of arrest, incarceration and release that has trapped many troubled individuals in the system for relatively minor, quality-of-life offenses.
The new plan will shift emphasis from punishment for minor crimes to treatment.
The changes include tripling the size of both pretrial diversion programs and the amount of resources devoted to easing the transition from jail back into society. This would represent a significantly different approach to criminal justice in the city, experts said. But they cautioned that nothing of such scale had been tried by a municipality before, and that putting the plan into effect would be difficult.