Please note: This is a Sole Source Notification.The Missouri Department of Transportation, St. Louis District, has determined that only one source, Traffic Control Corporation, can provide the department with JSF School Flashers with Applied Information Monitor Connectivity. It is determined that only one (1) distributor services the Missouri region for JSF Technologies and Applied Information traffic products. The SZ-3400 School Flasher contains a series beacons run on a preset schedule and are ideal for school zone speed limit signs installed on the roads. With Applied Information monitoring system, the school beacon system monitors your beacon flashers and Glance is a cloud-based connected platform, where you can supervise your school beacons and make changes to their schedules from anywhere. MoDOT - St. Louis currently has Applied Information installed and we are monitoring over 30 school beacons in the district. This is a onetime purchase.