Siliguri Corridor

[3] The Kingdom of Sikkim formerly lay on the northern side of the corridor, until its union with India in 1975 via a publicly held referendum.

[12][13] India has embarked on a slew of projects, such as the construction of India-China Border Roads and Advance Landing Ground (ALGs), Northeastern India connectivity and Look-East transnational connectivity projects including BIMSTEC and BBIN to create multiple alternatives to Silliguri corridor, including through Bangladesh and the sea.

Additionally, the old metre gauge line (recently converted to a 1.676 metres (5 ft 6.0 in) broad-gauge line) connects Siliguri Junction with Islampur in North Dinajpur district of West Bengal, via Bagdogra (the only airport of national interest in the corridor) and the bordering towns of Adhikari, Galgalia, Thakurganj, Naxalbari and Taiabpur with Nepal.

The Tetulia Corridor, an alternative to the Siliguri Corridor, is proposed under Article VIII of the India–Bangladesh Trade Agreement 1980, which states that "The two governments agree to make mutually beneficial arrangements for the use of their waterways, railways and roadways for commerce between the two countries and for passage of goods between two places in one country through the territory of the other".

[15] Militant groups known to have used the corridor include United Liberation Front of Asom (ULFA) and National Socialist Council of Nagaland (NSCN).

[15] A Chinese military advance of less than 130 km (81 mi) would cut off Bhutan, part of West Bengal and all of North-East India, an area containing almost 50 million people.

[17] Humphrey Hawksley, in his 2000 novel Dragon Fire, briefly authors a situation where China cuts off India's land route to its northeastern territories.