Ashwini Vaishnaw said the Budget contains a proposal to expand railway link between the region and the rest of the country to four tracks, fulfilling a long-felt need. Northeast Frontier Railway GM Chetan Shrivastava said the underground stretch would run from Tin Mile Haat to Rangapani stations within Bengal. During the 2017 Doklam stand-off, military planners had talked about the vulnerability of the Siliguri stretch of the corridor.