EAGLE is an innovative device, which integrates an high precision GNSS receiver with the capability of authenticating the position through the GNSS satellite signal recording, the I.D. satellite tracked, and their position in orbit. EAGLE introduces the possibility of a “Fluid Limited Traffic Zone”, in which fixed gates is no longer the standard method to regulate dynamically downtown access. Instead PA (Public Administration) can manage traffic in a new smarter way, implementing differential access to the city centre, based for example to a political rally, block-based pollution data, urban air quality and commercial activities. EAGLE would be the next step in Smart Mobility management, through the implementation of signal authentication, which will allow offering a wide range of new application for public administration especially in the fields of traffic management, parking and law enforcing.