A process is described that includes the generation and transmission of collision avoidance data and/or collision avoidance instructions based on data from 3-D radar scans of an airspace. The transmitted data and/or instructions could facilitate collision avoidance by aerial vehicles operating in the airspace. The transmitted data could be limited to protect the security, privacy, and/or safety of other aerial vehicles, airborne objects, and/or individuals within the airspace. The transmitted data could be limited such that only information pertaining to a region of the airspace proximate to a particular aerial vehicle was transmitted. The transmitted data could be limited such that it included instructions that could be executed by a particular aerial vehicle to avoid collisions and such that the transmitted data did not include location or other data associated with other aerial vehicles or airborne objects in the airspace.