India-Azerbaijan ties could accelerate key INSTC missing link: Expert

The INSTC is a 7,200-km multimodal (ship, rail, road) transport corridor connecting the Indian Ocean and Persian Gulf to the Caspian Sea via Iran, and onward to northern Europe via Russia. It was launched through an agreement signed in 2000 by India, Russia, and Iran to cut freight time and cost compared to the traditional Suez Canal route.

The single largest gap preventing the INSTC's Western route from becoming a continuous rail line is the roughly 164-km Rasht-Astara railway segment in Iran's Gilan province, which would connect Iran's rail network to Azerbaijan's, completing an unbroken rail corridor from Russia to the Persian Gulf.

Key Details

• Russia and Iran have signed cooperation agreements (including financing arrangements) to construct the Rasht-Astara line, since Azerbaijan's and Russia's rail networks are already linked and largely complete on their respective sides.
• Until this segment is finished, INSTC cargo along the Western route requires a combination of rail, road, and short sea/river legs, adding time and cost — the corridor is not yet a seamless rail line.
• India, as a corridor beneficiary rather than a builder of this specific segment, has an interest in the link's completion because it would make the Western route (via Azerbaijan) a lower-cost alternative to the Eastern route via Chabahar.
• Armenia's southern Syunik province is cited as an alternative land-bridge option connecting Iran to the South Caucasus and onward to Russia/Black Sea, giving India a choice between the Azerbaijan and Armenia corridors for last-mile connectivity.

India has for two decades pursued multiple, sometimes overlapping, connectivity projects to Eurasia and beyond, reflecting a strategic hedge against dependence on any single land corridor or maritime chokepoint.

Key Details

• Chabahar Port (Iran): developed under a trilateral India-Iran-Afghanistan framework, offering a maritime-linked alternative to Pakistan-transit routes for reaching Afghanistan and Central Asia; distinct from, but feeding into, the INSTC.
• A prospective rail link to India via Central Asia (through Kazakhstan/Uzbekistan-type routes) is being explored by Russia as a further diversification beyond the Iran-Azerbaijan and Iran-Chabahar options.
• These initiatives should be distinguished from China's Belt and Road Initiative-linked China-Pakistan Economic Corridor (CPEC), which India does not participate in due to sovereignty concerns over Pakistan-occupied Kashmir.
• India ratified the INSTC framework agreement in 2002, well before the corridor saw significant trade volumes, reflecting a long-term strategic commitment to Eurasian connectivity independent of near-term completion timelines.