The official said the road shows are aimed at "selling" the ambitious project to oil companies and financiers and invite investment for it.
The entire process of selection, selection of the consortium leader and finding the investors is expected to take one year. The construction of the pipeline is expected to
start in 2015.
After the road shows, bids will be invited to select the consortium leader who will be responsible for the design, funding, building, control and subsequent operations of the pipeline.
The US is backing the TAPI pipeline as an alternative to the Iran-Pakistan-India line in its efforts to choke Tehran financially over its suspected nuclear weapon programme.
While New Delhi had reached agreements on price and transit clauses for the IPI pipeline, TAPI is the first transnational line for which it has signed a Gas Sales and Purchase Agreement (GSPA) in May this year.
Besides meeting its energy needs, TAPI would be test of peace between India and Pakistan. More importantly, it will test Islamabad's resolve to normalise trade with its neighbour by allowing safe passage of the gas through the 800 km section of the pipeline passing through its territory.
Also, the 735-km leg through the Afghan provinces of Herat and Kandahar would presents significant security challenges.
TAPI will carry gas from Turkmenistan's Galkynysh field, better known by its previous name South Yoiotan Osman that holds gas reserves of 16 trillion cubic feet.