International Transport Corridors and Interstate Pipelines are important sources of conflict and competition between major powers. From a Realistic point of view, they are not only economic Initiatives but also can be used as a political leverage for countries en route. So each major power has proposed its own preferred corridor. EU’s TRACECA Initiative and Southern Gas Corridor, United State’s New Silk Road and its support for pipelines like BTE, TCP, TAPI etc, Chinese OBOR Initiative and Russia's support for International North-South Corridor-INSC and various pipeline projects are obviously in line with this Realistic Approach. I.R. Iran due to its geopolitical situation potentially faces different choices, so it is important to exactly survey this initiatives and obstacles facing. After offering a very exact and comprehensive description of European supported Interstate Initiatives in Caspian Sea and Black sea, this article will evaluate the consequences of the resolution of nuclear issue between I. R. Iran and the West and continuation of Development Oriented Foreign Policy in terms of reducing obstacles facing these initiatives. The hypothesis is that the resolution of nuclear issue, termination of sanctions and continuation of development oriented Foreign Policy will considerably ease the obstacles that development of Southern Gas Corridor-SGC facing, but will not overshadow TRACECA’s status.
