It has had a favorable impact on school attendance. With this curfew, students must stay at home or risk detention. Daytime curfew enforcement causes the minor to attend school, which can only benefit the minor. It cuts down on graffiti, vandalism and truancy. It keeps kids at home or in school where they are safe.
Police find more runaways and missing juveniles, reducing the number of delinquencies.
It does, in fact, make it safer. There is less traffic at night. Those over 17 are still out causing most of the trouble. They also said that curfews help the police to identify gang members and come in contact with them at an earlier stage, help to curb young peoples' activities before they become more violent, and help the police to seize the guns and drugs of gang members, thus impairing their ability to fight. Finally, the curfew helps to educate parents to the signs of gang membership and activity.