The New Delhi–Chennai main line is a railway line connecting Chennai and Delhi cutting across southern part of the Eastern Coastal Plains of India, the Eastern Ghats, the Deccan Plateau and the Yamuna valley. It covers a distance of 2,182 kilometres (1,356 mi) across Delhi, Haryana, Uttar Pradesh, Rajasthan, Madhya Pradesh, Maharashtra, Telangana, Andhra Pradesh and Tamil Nadu. The route is used by the Grand Trunk Express and as such is referred to by many as the Grand Trunk Route.

New Delhi railway station is the main railway station of the Indian capital of New Delhi. Platform 1 is located at Paharganj and platform 16 opens up on to the side of Ajmeri Gate. The station is in Central Delhi, about two kilometres (1.2 mi) north of Connaught Place in New Delhi. It is one of the busiest railway stations in the country in terms of train frequency and passenger movement.