One goal of the ARJIS-CapWIN agreement is to identify alternatives for the development of a secure network of public safety and transportation information that enables a properly authorized user to access and use information regardless of its location in national, State, local, or private-sector databases. Another goal is to identify methods for exchanging data, communicating, and enhancing response capabilities of transportation and public safety. Other goals are to develop model agreements and best practices for all U.S. jurisdictions and to partner with Federal agencies in developing new technologies and methods. One of the most critical challenges in deploying a mobile data system is to determine how to select the appropriate wireless infrastructure to move the data. The infrastructure can be either a commercial wireless network or a private proprietary one. The advantages and disadvantages of each of these infrastructures are noted in this article. A possible third option being considered for the future is the creation of a nationwide trusted information network dedicated to the public safety and national responder communities.