The same article reports that Turkish officials estimate the cost of the TAGP will be 5-6 billion dollars. This would be a significant savings over Europe's preferred Nabucco route, estimated between 10-19 billion dollars.
The TAGP is a clear alternative to other Southern Corridor proposals, but does not necessarily foreclose being incorporated into a larger project at a later date. Turkish Minister of Energy and Natural Resources Taner Yildiz said the TAGP would reduce the cost of the larger proposals, while casting doubt that they would ever be built. "The implementation of such projects as Nabucco, ITGI and TAP seemed doubtful," the Asia Times quotes.
Azerbaijani Foreign Minister Elmar Mammadyarov disagreed. At a Washington DC conference in October, he said the Azerbaijani-Turkish transit agreement meant the Southern Corridor was one step closer to being launched," according to UPI.