Traffic safety is a major department priority, given Nassau's relative lack of public transportation and its perpetually clogged roads and highways. A unique feature of the department is its Children's Safety Town, an actual village built to 1/3 scale that includes paved streets, two intersections equipped with traffic signals, an overpass, two tunnels, a simulated railroad crossing and 21 buildings. Managed by the department's Traffic Safety Unit, it allows the NCPD to teach traffic and bicycle safety to grade schoolers under controlled conditions.