To　improve　sufficienl　of　Traffic　Impact　Analysis　and　on　the　basis　of　the　Pile-up　Effect　of　Local　Land　Development,　Traffic　Impact　Analysis　of　land　development　in　urban　areas　is　put　forward.　The　aralysis　takes　essential　traffic　bottlenecks　in　or　around　the　study　area　as　constraint　conditions　and　the　paper　proposes　the　positioning,　technical　solutions　and,　the　assessment　method　of　Regional　Traffic　Impact　Analysis　(RTIA).　This　paper　also　studies　the　key　technique　of　RTIA,　which　states　how　to　decide　regional　land　development　capacity　calculated　by　surplus　road　capacity　in　objective　year.　Inverse　Four-stage　Land　Feedback　Model　is　also　set　up　which　will　provide　the　theoretic　base　for　controlling　urban　regional　land　use.