The Randolf Career Technical Education Center is the first educational partner in a Detroit program that allows police to monitor surveillance cameras to reduce crime.

Officials installed more than 20 surveillance cameras at the trade school as part of Project Green Light, a project started in 2016 to create safer neighborhoods, according to the Detroit News. Participants pay between $4,000 and $6,000 to install the cameras and a monthly fee for video storage. Cameras are monitored by police and civilians.

Detroit Police Chief James Craig says the program has reduced citywide crime by 23 percent, according to US News. Police department statistics show an 11-percent decline in violent crimes at or near the project’s locations in 2017 over the previous year. The city has not compared crime rates of project locations with those at nonparticipating properties, however.