Abstract: The functionality associated with an RDS/RBDS messaging system is enhanced by allowing users of the system access to a secure server which gives them the ability to manage the user address space, to compose custom and preformatted messages and to access CAP files that might contain information affecting users in the area of an FM transmitter sending alert messages. The alert messages are sent to the RDS/RBDS encoder as ODA data groups using a developed protocol. Standard alert radios are modified to utilize the functionality of the system. The system will also send back up alerts to a users cellular telephone and to specified email, SMS and text messaging destinations.