November 27, 2019: The 650 kilometres of railroad along the golden quadrilateral that connects the four metros of India Delhi, Mumbai, Chennai and Kolkata will soon get the automatic train protection (ATP) sys
November 27, 2019: The 650 kilometres of railroad along the golden quadrilateral that connects the four metros of India Delhi, Mumbai, Chennai and Kolkata will soon get the automatic train protection (ATP) sys
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