The Comprehensive Transition Planning Project (CTPP) applied research and technical assistance to understand the needs of people held at New York City’s main jail facility, Rikers Island, and the extent to which existing reentry services meet those needs. Its goal was to improve services designed to help incarcerated people return to the community more successfully. CTPP was a partnership between Vera’s Program on Substance Use and Mental Health and the New York City Department of Correction.