• INSTC is an ambitious multimodal transport system established in 2000 by Iran, Russia and India to promote transportation cooperation.
• It is aimed to provide the shortest multi-model transportation route linking the Indian Ocean and the Persian Gulf to the Caspian Sea via Iran and St Petersburg.
• The objective of the corridor is to increase trade connectivity between major cities such as Mumbai, Moscow, Tehran, Baku, Bandar Abbas, Astrakhan, Bandar Anzali and etc.
• The estimated capacity of the corridor is 20-30 million tonnes of goods per year.
• It is planned to connect the Indian Ocean and Persian Gulf to the Caspian Sea through Iran and then onwards to St. Petersburg and northern Europe through Russia.
• The route primarily involves moving freight from India, Iran, Azerbaijan and Russia via ship, rail and road.

Source:WIki