a network server is presented operable to communicate time - critical information over a wireless communications system , comprising a location manager , an alert notification manager , and a message delivery notification manager . the communications system is a push - to - talk over cellular system , including a wireless carrier core ip network , which may connected to a private intranet service . location manager identifies and locates recipients within a known geographical area . message delivery notification manager schedules and formats delivery of alert messages , based upon geographic location and direction of travel of each recipient . the network utilizes existing systems to communicate the information utilizing a push - to - talk cellular networking system , to immediately provide such information to the subscriber without inquiry seeking such information .