India, July 9 -- After the Mumbai-Ahmedabad bullet train project, the Centre is planning to transform the Delhi-NCR region into the next major hub of India's high-speed rail network with four proposed bullet train corridors radiating from the national capital.

The most ambitious among them is the proposed Delhi-Varanasi-Siliguri corridor, which is expected to become India's longest high-speed rail line.

The four routes are part of the seven high-speed rail corridors announced by the Union government in the Budget and are expected to involve investments of nearly Rs 2 lakh crore.

Delhi-Lucknow-Varanasi corridor

The proposed Delhi-Lucknow-Varanasi bullet train is aimed at boosting connectivity across Uttar Pradesh by linking major relig...