The State of New Jersey’s Juvenile Detention Alternatives Initiative (JDAI) has significantly reduced the number of juveniles who were housed at the Mercer County Youth Detention Center. Services are no longer provided at the Parkside Avenue location. Youth previously housed at the County center will be held at the Middlesex County Juvenile Detention Center at US Highway 130 North, North Brunswick, NJ 08902. The phone number is (732) 297-8991.