By Nargiza Umarova

The fourth session of the India–Central Asia Dialogue at the level of foreign ministers convened in New Delhi on 6 June 2025. The concluding communiqué underscored the significance of Iran’s Chabahar Port in advancing trade connectivity between the Central Asian republics and India, and beyond. 

The Indo-Iranian Chabahar initiative competes with the port of Gwadar, a pivotal component of the China–Pakistan Economic Corridor (CPEC), which envisages the integration of Central Asia through the development of a trans-Afghan railway. Concurrently, Russia is pursuing its distinct agenda by engaging with the Taliban to extend the International North–South Transport Corridor (INSTC) into Afghanistan. Under such conditions, the Central Asian republics face the risk of becoming entangled in a cycle of great power competition, thereby endangering their own national interests.

BACKGROUND: Since 2020, Uzbekistan has engaged in dialogue with India and Iran regarding the joint utilization of the deep-water port of Chabahar, which provides direct access to the Indian Ocean. Situated in southeastern Iran, the port constitutes a critical component of Tashkent’s strategy to develop southern transit corridors and diversify freight transportation routes. Chabahar functions as a commercial gateway to Central Asia and Afghanistan, affording major global economies—especially India—access to key regional resources. This underlies New Delhi’s commitment to upgrading the Shahid Beheshti terminal in Chabahar and enhancing the surrounding transport infrastructure. 

Moreover, transit through Iran reduces the cost and duration of Indian cargo shipments to and from Central Asia by nearly one-third relative to maritime routes via Europe or China. India’s objective extends beyond securing efficient and affordable access to uranium, oil, coal, and other raw materials from Central Asia; it also involves circumventing its principal rival, Pakistan.

The Indian transit corridor to Central Asia, originating at Chabahar, may proceed through both Iran and Afghanistan. In 2020, Iran commenced construction of the 628-kilometer Chabahar–Zahedan railway line, with financial assistance from India. Work on this segment is nearing completion. The route is projected to continue toward the Turkmenistan border, traversing the northern Iranian cities of Mashhad and Serakhs. En route, the Chabahar–Zahedan–Mashhad railway will diverge toward the city of Khaf, where the inaugural cross-border rail link between Iran and Afghanistan begins.

The construction of the 225-kilometer railway linking Khaf to Herat in Afghanistan is also approaching completion. Its designed capacity is estimated at up to three million tons annually, with transit cargo expected to comprise more than half of this volume. Consequently, the Khaf–Herat railway is poised to be integrated into a broader China-led transport initiative connecting East and West through Central Asia, Afghanistan, and Iran. Owing to its direct linkage with Afghanistan, Uzbekistan stands to benefit from this configuration by enhancing its own transit capacity. The Taliban administration seeks comparable advantages for Afghanistan and is actively encouraging Tashkent to extend the railway from Mazar-i-Sharif to Herat. While such an extension would grant Uzbekistan additional access to Chabahar by circumventing Turkmenistan, it could also redirect China–Europe–China transit cargo toward other neighboring states bordering Afghanistan. 

IMPLICATIONS: For several years, Iran has actively pursued the realization of the China–Kyrgyzstan–Tajikistan–Afghanistan–Iran railway corridor, commonly referred to as the “Five Nation Road.” The Afghan segment of this 2,100-kilometre overland route will primarily comprise the railway currently under construction between Mazar-i-Sharif and Herat. From Mazar-i-Sharif, the transportation network would require only an extension to Sherkhan Bandar in Kunduz Province to establish a connection with the Tajik border. This development would facilitate Tajikistan’s access to Iran through Afghan territory, thereby definitely weakening Uzbekistan’s competitive position in regional transit logistics.

The Taliban regard the Mazar-i-Sharif–Herat railway as an integral element of a broader initiative aimed at establishing a Trans-Afghan corridor extending through Kandahar to Pakistan, analogous to Uzbekistan’s proposed Kabul Corridor. In 2023, the Afghan authorities announced plans to construct the Mazar-i-Sharif–Herat–Kandahar railway, which, according to media sources, is projected to provide the shortest overland route between Moscow and New Delhi via Afghanistan. Russia, Turkmenistan, Kazakhstan, and even Turkey have been invited to invest in the venture. 

The attractiveness of the Kandahar Corridor lies in its capacity to extend toward both Iran and Pakistan. Ashgabat and Astana are already advancing a new transit route from the Torghundi railway station, located at the Afghan–Turkmen border, toward Pakistan, traversing western Afghanistan. Recently, the Russian Ministry of Transport announced the initiation of a feasibility study for the Trans-Afghan railway, covering the Mazar-i-Sharif–Herat–Kandahar–Chaman route. 

Without reaching Kandahar in the city of Delaram, both lines could be redirected westward and linked to Iran’s Zahedan via Zaranj in Nimroz Province, ultimately reaching the port of Chabahar.

Consequently, the Central Asian states will gain an additional opportunity to access the warm waters of the Indian Ocean. However, this scenario presents significant implications for Uzbekistan. Foremost, the advancement of the Kandahar Corridor—regardless of whether it extends toward Iran—raises concerns regarding the viability of the Trans-Afghan Railway via Kabul, which Tashkent has identified as a core interest. The simultaneous operation of both routes will inevitably result in competition for transit cargo, thereby impacting their overall profitability. Uzbekistan is will unlikely be able to impede the construction of the Mazar-i-Sharif–Herat railway, as the initiative partially aligns with the interests of Russia, India, Iran, and China. Under such circumstances, preserving the relevance of the Kabul Corridor—particularly amid funding constraints—becomes exceedingly challenging.

Secondly, the construction of the Zaranj–Delaram railway line will establish conditions conducive to the redistribution of cargo flows transiting Afghanistan toward South Asia and beyond, in favor of Chabahar. This development represents a direct challenge to the China–Pakistan Economic Corridor, the most costly and prominent flagship project of the Belt and Road Initiative, which prioritizes the expansion of the Gwadar port on Pakistan’s Arabian Sea coast. Enhancing Chabahar’s transit capacity through the creation of a comprehensive network of rail and roads linking the port to neighboring countries and regions within Iran’s periphery may diminish the significance of the Kabul Corridor as a land bridge between the poles of continental Asia.

Should the Kandahar route be developed and extended into Iran, Gwadar will be compelled to share prospective cargo flows with Chabahar, thereby intensifying the rivalry between New Delhi and Beijing. Russia must also be considered, as it views the Trans-Afghan Railway as a means to extend its flagship International North–South Transport Corridor (INSTC) into Afghanistan. Preliminary estimates place the volume of Russian cargo on the Trans-Afghan route at between 8 and 15 million tons annually. In light of escalating tensions between Kabul and Islamabad, as well as the generally unstable security climate in Pakistan—particularly in the provinces of Khyber Pakhtunkhwa and Balochistan, through which two proposed railway branches from Central Asia to Indian Ocean ports are planned—Russia may opt to reroute a portion of its exports to Chabahar via Afghanistan. Over time, this shift could also influence freight transit patterns from Northern Europe to India.

Nevertheless, the ongoing escalation of armed conflict between Iran and Israel introduces significant uncertainty regarding the feasibility of such transport configurations. A protracted period of hostilities, accompanied by potential political destabilization within Iran, will unavoidably impact the reliability of established logistics networks in West Asia, potentially necessitating their complete reconfiguration. Under these conditions, both the trans-Afghan corridors leading to Iran and the Indian access route to Central Asia via Afghanistan will be placed at considerable risk. This situation will undoubtedly compel stakeholders to revise their strategies concerning the Chabahar project and to place greater emphasis on leveraging Pakistan’s transit capabilities.

CONCLUSIONS: Uzbekistan’s proactive engagement in the development of a network of trans-Afghan trade routes is anticipated to yield both economic and political advantages by enhancing its national and regional transit capacity. However, realizing these outcomes will require Tashkent to navigate carefully among the interests of global and regional powers, whose influence may significantly shape the implementation of specific transport initiatives within Afghanistan.

For the Central Asian states, maintaining diversified access to the southern ports of Iran and Pakistan is advantageous, provided that intra-regional competition is avoided, as such rivalry could undermine their collective competitiveness along the trans-Afghan corridor. Accordingly, it is essential to implement a coordinated policy aimed at identifying and advancing mutually beneficial transport routes through Afghanistan. Reaching consensus on a unified negotiating stance in engagements with the Afghan leadership is vital to mitigate the risk of the Taliban enacting externally influenced political decisions that may contradict the interests of Central Asian states.

AUTHOR’S BIO: Nargiza Umarova is a Senior Research Fellow at the Institute for Advanced International Studies (IAIS), University of World Economy and Diplomacy (UWED) and an analyst at the Non-governmental Research Institution “Knowledge Caravan”, Tashkent, Uzbekistan. Her research activities focus on developments in Central Asia, trends in regional integration and the influence of great powers on this process. She also explores Uzbekistan’s current policy on the creation and development of international transport corridors. She can be contacted at This email address is being protected from spambots. You need JavaScript enabled to view it. .

By Nargiza Umarova

In recent years, the Taliban government has successfully garnered the support of most Central Asian countries for the development of trans-Afghan transport infrastructure. Notably, Uzbekistan and Turkmenistan have demonstrated significant engagement in this endeavor, with each country advancing its own railway project traversing Afghanistan to reach the borders of Pakistan. These routes are expected to compete with one another, a dynamic that is anticipated to enhance their profitability through the implementation of flexible tariff policies aimed at maintaining sufficient cargo flow. The establishment of trans-Afghan rail corridors holds strategic significance not only for fostering connectivity between Central and South Asia but also for advancing Iran’s aspirations to develop efficient transportation links with China via Afghanistan—a goal that the Taliban government has expressed its willingness to support.

Photo by Pahari Sahib

BACKGROUND: In May 2023, Afghan authorities approved the Mazar-i-Sharif-Herat-Kandahar railway corridor project, which spans 1,468 kilometers. A year later, plans were announced for the construction of the Spin Boldak-Kandahar railway, signaling the intention to extend the Kandahar route to Pakistan. Turkmenistan promptly capitalized on this development by proposing an alternative version of the Trans-Afghan Corridor, extending along the Torghundi-Herat-Kandahar-Spin Boldak route.

Subsequently, Kazakhstan joined the project at the invitation of Ashgabat, and in September 2024, the foundation was laid for a 22-kilometer railway line connecting the border station of Torghundi to Sanobar. This section will serve as the initial segment of the Torghundi-Herat transport corridor.

The Turkmen version of the trans-Afghan railway is regarded as an alternative to the Kabul Corridor (the Termez-Mazar-i-Sharif-Kabul-Peshawar railway), although the latter route is significantly shorter. Competition between the western route (originating from Turkmenistan's border) and the eastern route (originating from Uzbekistan's border) appears inevitable. However, this competition is expected to yield positive outcomes, particularly through the reduction of transportation costs resulting from the launch of additional trade routes through Afghanistan. This cost efficiency is a critical factor driving the interest of external stakeholders in the development of trans-Afghan transport infrastructure.

The establishment of the Torghundi-Spin Boldak international transport corridor holds particular importance for Tehran, which intends to develop a railway link with Afghanistan through the border town of Zaranj.

Since 2020, as part of the broader development of Iran's deep-sea port of Chabahar, construction has been underway on the Chabahar-Zahedan railway. This railway is planned to extend further into Afghanistan, reaching the provinces of Nimroz and Kandahar. Recently, Afghan authorities announced the completion of engineering surveys for the construction of the Zaranj-Kandahar railway. This integrated infrastructure will provide Iran with an additional avenue to access Afghanistan, while also establishing a direct connection to Herat—one of Afghanistan's largest and most strategically significant cities.

Tehran’s long-term strategic vision positions Herat as a pivotal hub for transit routes connecting Western, Central, and Eastern Asia. This perspective stems from the concept of the China-Kyrgyzstan-Tajikistan-Afghanistan-Iran railway corridor, commonly referred to as the "Five Nation Road." Iran has already initiated the practical implementation of this vision through the construction of the Khaf-Herat railway, which is scheduled to become operational in 2025. Once completed, the route will extend to Kashgar in China via Central Asia, covering an approximate distance of 2,000 kilometers.

IMPLICATIONS: Iran has consistently encouraged Afghan authorities to collaborate with their Central Asian partners in advancing the railway corridor connecting Khaf to Kashgar.

In 2017, Uzbekistan and Afghanistan reached an agreement to construct the Mazar-i-Sharif-Sheberghan-Maimana-Herat railway. Integrating this new route with the Khaf-Herat railway would enable Uzbekistan to establish an alternative transit corridor to Iran, Turkey, and the Gulf countries, bypassing Turkmenistan. Additionally, this development would have a substantial impact on the implementation of the Five Nation Transit Route, as the Khaf-Herat-Mazar-i-Sharif railway constitutes a critical segment of the Afghan portion of this corridor. From Mazar-i-Sharif, transportation links would only need to be extended to Sherkhan Bandar in Kunduz province to connect with Tajikistan's border.

However, in 2018, Tashkent introduced a new trans-Afghan railway project toward Pakistan, known as the Kabul Corridor, effectively placing the implementation of the Mazar-i-Sharif-Herat route on hold. This decision was likely influenced by the recognition that the railway to Herat could undermine Uzbekistan’s transit interests. By prioritizing the Kabul Corridor, Uzbekistan sought to secure its role in servicing freight flows from China, Kyrgyzstan, and Tajikistan to Iran, Turkey, and Europe.

Despite these developments, progress on the China-Kyrgyzstan-Tajikistan-Afghanistan-Iran railway corridor continued. In 2019, Afghanistan and Tajikistan signed an agreement to construct the Jaloliddini Balkhi (Kolkhozobod)-Panji Poyon-Sherkhan Bandar railway. To finance the feasibility study for this project, Dushanbe sought assistance from prominent international donor organizations, including the World Bank and the Asian Development Bank.

At that time, establishing a railway connection between Afghanistan and Tajikistan was also pivotal for the development of the Turkmenistan-Afghanistan-Tajikistan (TAT) transport corridor, initiated in 2013. This corridor extends from the Tajik border into northern Afghanistan, passing through the cities of Kunduz, Khulm, Mazar-i-Sharif, Sheberghan, and Andkhoy. At the Akina checkpoint, the railway crosses into Turkmenistan, from where it can connect to the Caspian Sea. This route aligns with the concept of reviving the ancient Lapis Lazuli Corridor, which aims to provide Afghanistan with direct access to European markets via the Caspian Sea, Azerbaijan, and Turkey.

In 2016, Turkmenistan completed the first stage of the TAT railway, spanning the Atamurat (Kerki)-Ymamnazar-Akina route. By early 2021, the Akina-Andkhoy railway line also became operational. However, the abrupt change of power in Afghanistan during the summer of 2021 led to the suspension of work on these projects. This pause stemmed from uncertainty regarding the Taliban government's approach to relations with neighboring countries and its foreign policy on transport communications. Yet contrary to initial expectations, the new leadership in Afghanistan adopted a notably more pragmatic stance on these matters.

The Taliban have reactivated nearly all regional and interregional transport projects. Announcements have been made regarding the planned launch of the Andkhoy-Sheberghan and Sheberghan-Mazar-i-Sharif railway lines in the coming years, as well as the construction of the Mazar-i-Sharif-Herat railway. These initiatives aim to bridge critical gaps in major trade corridors, including the TAT and the Five Nation Railway Route.

Notably, even Tajikistan, despite its tough stance toward the Afghan government, has become more active in advancing trans-Afghan transport initiatives. In July 2024, Tajikistan’s Ministry of Transport and the Korea International Cooperation Agency (KOICA) signed a protocol to develop a feasibility study for a 51-kilometer Jaloliddini Balkhi-Panji Poyon railway, which will connect to Afghanistan via the Sherkhan Bandar checkpoint. As previously mentioned, this railway will form part of the TAT.

Integration into such international transport corridors will offer Tajikistan a strategic advantage on southern transit routes. However, the modernization of existing infrastructure and the construction of new railways demand significant financial resources, which Dushanbe struggles to provide. Tajikistan relies heavily on China for foreign investment. Beijing has a vested interest in developing fast and efficient transportation routes to access emerging markets in South Asia, the Middle East, and Europe.

If the Taliban succeed in persuading Tajikistan to collaborate on developing trade routes to China, this could significantly reshape Central Asia's transport architecture while enhancing Afghanistan's strategic importance as a regional transit hub. Iran would also benefit from a direct connection to China that bypasses Turkmenistan, Uzbekistan, and Kazakhstan.

For Tashkent, however, this development could present a serious challenge given the resolve of its neighbors to complete the TAT. 

CONCLUSIONS: The proactive efforts of the Taliban government in developing international transport links has heightened the interest of most Central Asian states (with the exception of Tajikistan) in strengthening trade and economic ties with Kabul. This includes the potential implementation of joint investment projects, such as the construction of railways, gas pipelines, and power lines, which could foster regional connectivity and economic growth.

External major powers are also eager to capitalize on these transformations, but their interference in establishing trans-Afghan transport infrastructure could have adverse consequences for Central Asia.

Iran’s ambitions to establish a transport corridor to China via Afghanistan pose the potential to alter the balance of power within the regional transit system. Such a development would bolster the positions of Tajikistan and Kyrgyzstan, which are currently in a transport deadlock and reliance on Uzbekistan for access to global markets.

The development of new trade routes through Afghanistan represents a positive trend that will inevitably influence Central Asia due to the region’s geographical proximity. This shift offers regional states the opportunity to enhance their transit and trade capacities, albeit accompanied by increased competition. To mitigate the risks of intense rivalries, the Central Asian republics must reconcile their interests in light of Afghanistan’s growing significance as a transit hub and formulate a coordinated strategy to advance interregional transport corridors, ensuring equitable benefits across the region.

AUTHOR’S BIO: Nargiza Umarova is a Senior Research Fellow at the Institute for Advanced International Studies (IAIS), University of World Economy and Diplomacy (UWED) and an analyst at the Non-governmental Research Institution  “Knowledge Caravan”, Tashkent, Uzbekistan.

Her research activities are focused on studying developments in Central Asia, trends in regional integration and the influence of big powers on this process. She also explores the current policy of Uzbekistan on the creation and development of international transport corridors. She can be reached at This email address is being protected from spambots. You need JavaScript enabled to view it. .