Just Flight has announced that their Development Team have begun work on a version of Traffic Global for X Plane 11 that will follow the release for FSX an P3d.
This is the answer to my prayers as although there are other ai's such as X-Life World Traffic 3 Traffic Global which are payware and Live Traffic freeware, it still involves a lot of messing about to get them set up so hopefully this one from Just Flight will be install and forget!!
