- The Trans-Afghanistan Pipeline (also known as Turkmenistan–Afghanistan–Pakistan–India Pipeline, TAP or TAPI) is a proposed natural gas pipeline being developed by the Asian Development Bank.
- Expected to be completed around 2017, the pipeline will transport Caspian Sea natural gas from Turkmenistan through Afghanistan into Pakistan and then to India.
- The abbreviation comes from the first letters of those countries.
- Proponents of the project see it as a modern continuation of the Silk Road. Estimated cost of the pipeline project is reported at $7.6 billion.