Among the three branches of the International North-South Transport Corridor, the Western Branch — the rail route running through Azerbaijan and Iran — has generated the most long-term interest from Russian and Indian trade planners. It also has the most well-defined bottleneck: a 162-kilometer missing rail link between Rasht and Astara in Iran. For shippers evaluating INSTC routing in 2026, understanding this gap is critical to setting realistic expectations.
What Is the Rasht-Astara Gap?
The Rasht-Astara section is the final unbuilt piece of a continuous rail line intended to connect Russia to Iran's Persian Gulf ports, and from there to Indian maritime routes. Without this link, cargo moving along the Western Branch must transfer to road transport for this segment, adding handling time, cost, and complexity to what would otherwise be a single-mode rail journey. Financing for the project has moved forward: approximately €1.6 billion has been finalized to fund construction, and the build is expected to take around 48 months once fully underway. Even under an optimistic timeline, industry expectations are that the link is unlikely to be complete before 2030.
Why the Delay Matters for Russian Importers and Exporters
- Rail-only Western Branch shipping is not yet a reliable planning assumption. Any route relying on continuous rail from Russia through Iran to the Gulf still requires a road-transport workaround for the missing segment.
- Multimodal alternatives remain the practical choice. The Trans-Caspian Branch (sea crossing) and the Eastern Branch (direct maritime routes, including the Chennai-Vladivostok Eastern Maritime Corridor) are operational today and do not depend on the Rasht-Astara completion.
- Long-term corridor capacity will eventually shift. Once complete, the Rasht-Astara link would meaningfully increase the Western Branch's throughput and reliability, reinforcing INSTC's position as an alternative to Suez Canal routing. Until then, capacity growth is coming primarily from the corridor's maritime branches.
The Bigger Picture: INSTC Growth Continues Regardless
It is worth noting that the Rasht-Astara gap has not stalled overall INSTC momentum. The corridor carried 26.9 million tonnes of cargo in 2024, up 19% year-on-year, and in July 2026 the first official Russia-to-India shipment was confirmed to have moved through INSTC transit. This growth has been driven largely by the branches that are already functional — the Trans-Caspian and Eastern routes — while the Western Branch's rail backbone continues under construction.
How Shippers Should Plan Around the Gap
- Treat the Western Branch as a multimodal route for now, incorporating a road segment across the Rasht-Astara gap where this route is used at all.
- Prioritize the Trans-Caspian and Eastern branches for time-sensitive or high-volume shipments in the near term.
- Monitor construction progress as part of ongoing route planning, since the 2030 timeline could shift with financing or construction developments.
- Work with a forwarder that offers route flexibility, so cargo can be redirected between branches as conditions on the ground change.
Practical Routing Today, Not Just in 2030
Waiting for a single infrastructure project to close a gap is rarely a viable freight strategy. Russian importers need reliable delivery of cargo from India to Russia now, which means leaning on the corridor branches — and non-INSTC options — that are already delivering results. RR Brothers and Logistics designs personalized routes for every shipment, drawing on sea, rail, air, and road freight capacity, plus a decade of experience navigating exactly these kinds of infrastructure transitions. With offices in Moscow and across India, we track corridor developments like the Rasht-Astara build directly and adjust client routing accordingly, with transparent, honest reporting on any delays. If you need a dependable route for cargo between India and Russia today — not in 2030 — contact us to discuss a solution built around current corridor realities.