The Minister of state for Railways also launched various facilities at the Nagercoil Junction railway station.
Gohain laid the foundation stone for the doubling and electrification projects covering 349 km in this sector, a Southern Railway release said.
Gohain also inaugurated an escalator, Wi-Fi services and 100 per cent LED lighting at Nagercoil Junction, it added.
The release quoted Gohain as saying Indian Railways was making "continued efforts" to enhance facilities for passengers and that more customer-oriented amenities were being implemented.
Union Minister of State for Finance and Shipping Pon Radhakrishnan and local MLAs participated in the function.
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