Other then a physics engine for each itteration I don't see why the community couldn't be the ones to handle these bits too. I mean the collective "WE" have done a pretty good job filling rF1 with cars and tracks. Roads I believe the creator said could be automated but it would just be a rough-in and an artist (or just very patient person) would need to fly along it making corrections as they went. The Flight sim modding community is huge as well. The "getting it all working together" part requires some innovation. If planetside2 can have 3000 players in a server with very few latency issues then I think you could get area boundaries that cover similar numbers in OT should everyone want to go to one spot and do something.