Old National Highway 2 or Old NH 2, was a major National Highway in India, that connected the states of Delhi, Haryana, Uttar Pradesh, Bihar, Jharkhand and West Bengal. It constitutes a major portion of the historical Grand Trunk Road along with old NH 91 and old NH 1 in India. The highway connects national capital Delhi with Kolkata as well as important cities such as Faridabad, Mathura, Agra, Kanpur, Allahabad, Varanasi, Dhanbad, Asansol, Durgapur and Bardhaman.

National Highway 19 is a national highway in India. It was previously referred to as Delhi–Kolkata Road and is one of the busiest national highways in India. After renumbering of national highways, Delhi to Agra route is now national highway 44 and Agra to Kolkata route is numbered national highway 19. It constitutes a major portion of the historical Grand Trunk Road. It is also part of AH1 of Asian Highway Network, that traverses from Japan to Turkey.