I've been working on a project anyone is welcome to take a look at on my test server, for feedback and testing.  It adds ambient life in a fashion similar to games like GTA and Just cause.  No mods are required as everything runs server side.  Please give it a try, and let me know what you want to see as it's developed further.  I am working on police response etc.  but for now the police are hostile.  You can expect all the normal features of wasteland as well, with better performance as I've added my own optimizations.  The current test environment is on Stratis.   this system employed uses performance throttling and other enhancements to ensure the ambient life will work without affecting performance.