રાષ્ટ્રીય ધોરીમાર્ગ 2 (NH 2), જે સામાન્ય રીતે દિલ્હી-કોલકાતા માર્ગ તરીકે ઓળખાય છે, ભારતનાં સર્વાધિક વ્યસ્ત માર્ગોમાંનો એક છે. આ માર્ગ દેશના છ રાજ્યોમાંથી પસાર થાય છે અને રાષ્ટ્રીય ધોરીમાર્ગ 91 તથા રાષ્ટ્રીય ધોરીમાર્ગ 1 સાથે ‘ગ્રાન્ડ ટ્રંક રોડ’ના મુખ્ય ભાગ સમાન છે.

NH 2 in Uttar Pradesh

(West-east alignment)
The National Highway 2 enters Uttar Pradesh from Delhi in Mathura district, and a part of it is known as Mathura Road. Before Mathura it covers Palwal and Faridabad city in Haryana. After Mathura it reaches Agra which is about  from Delhi. In Agra it covers about . After leaving Agra it enters Etawah where 15  km bypass of city is made. After leaving Etawah it enters Kanpur city where a  and 12 lane Kanpur over-bridge has been built which is also one of the largest over-bridges in the Asia. In Kanpur it covers industrial belts (Akbarpur-Maharajpur) around  and then it reaches Fatehpur District and covers  area of Fatehpur City and it also covers a  long area of Malwan Industrial Area of UPSIDC Fatehpur district where many major industries are situated & the world's famous Mohan Malwan Peda is also Situated on NH-2 Near Malwan Fatehpur

, Fatehpur have 3 by-pass section in NH-2, 1st is Kanpur by-pass 2nd is Lucknow by-pass and 3rd is Allahabad by-pass Fatehpur is a major district between Kanpur and Allahabad and then it reaches Allahabad via Kaushambhi and covers  in city then reachesVaranasi-Mughalsarai covers  and thus leaves U.P. This national highway has given a new life to public transport in Northern India. The overbridges built in Agra, Kanpur, Fatehpur and Allahabad have reduced city traffic problems. Allahabad Bypass Expressway is also the country's longest bypass section.

NH 2 in Bihar
(West-east alignment)
The Bihar stretch of NH 2 starts from the bridge on the Karmanasa River that forms the border with Uttar Pradesh.
NH 2 runs for 202 km in the state and then enters Jharkhand, between Dobhi and Chauparan, around Barachatti. In between it passes through Kaimur district. Mohania is the first major town on it. Also NH 30 is connected to NH 2 in the city and leads to Patna city. The next city is Sasaram where there is the tomb of Great Emperor Sher Shah Suri. At Dehri- on-Son it crosses the wide expanse of the Son River over the Jawahar Setu. At Dobhi it meets the road to Gaya and Patna (NH 83). NH 98 from Patna to Daltonganj crosses NH 2 at Aurangabad.

NH 2 in Jharkhand
(East-west alignment)
The Jharkhand stretch of NH 2 extends from the bridge on the Barakar River on the Asansol-Nirsa bypass to around Barachatti, and runs for . Immediately after crossing into Jharkhand from West Bengal, NH2 meets the junction with the road on the north leading to Maithon and the road on the south leading to Panchet. NH 2 returns to old Grand Trunk Road at Nirsa. At Gobindpur NH 2 meets NH 32 leading to Dhanbad and Jamshedpur. At Topchanchi there is a picturesque lake, off NH2. Thereafter for a long stretch up to Isri the massive Parasnath Hills / Shikharji dominates on the northern side of NH 2. At Dumri, the road on the north leads to Madhuban and Giridih. The next important junction is Bagodar where NH 100 meets NH2. There is a road leading to Hazaribagh Road station. At Barhi is the crossing with NH31 and NH33. Between Chauparan and Dobhi, around Barachatti, NH 2 crosses over to Bihar. Much of the Jharkhand sector of NH 2 passes through an undulating area on Koderma plateau.

NH 2 in West Bengal
(East-west alignment)
The West Bengal end of NH 2 starts or terminates at Dankuni in the outskirts of Kolkata . There is a  stretch to the Nivedita Bridge, and thereafter Belghoria Expressway links it to Barrackpur Trunk Road, and Jessore Road/ NH 34. Alternatively, Kolkata bound traffic takes the NH 6 at Dankuni and then follows the Kona Expressway/NH 117 and Vidyasagar Setu to enter Kolkata.

The four–lane West Bengal portion of NH 2 stretches from Barakar to Dankuni and the entire stretch is complete. The  Dankuni-Palsit stretch is also known as Durgapur Expressway. From Palsit to the outskirts of Asansol it follows the old Grand Trunk Road bypassing such towns as Saktigarh, Bardhaman and Raniganj but passes through Durgapur and Andal. The Palsit–Panagarh stretch is  and the Panagarh–Raniganj stretch is . At Panagarh Darjeeling Mor NH 2 meets Panagarh–Morgram Highway. In the outskirts of Asansol NH 2 leaves Grand Trunk Road. The latter passes through crowded areas of Asansol, Neamatpur, Kulti and Barakar in West Bengal and Chirkunda and Kumardhubi in Jharkhand. A bypass links the outskirts of Asansol with Nirsa, where the NH 2 gets back to Grand Trunk Road. The Raniganj–Barakar stretch is . The widened  Panagarh–Dhanbad stretch was thrown open to traffic in 2001.

Construction cost of the  Panagarh–Dankuni section was 178 million US dollars. The entire stretch in West Bengal happens to be a toll zone. There are toll plazas at three places: Asansol, Palsit and Dankuni. Asansol toll plaza is now closed. Instead a new toll booth has been established at Maithon More in Jharkhand, just a few kilometres after crossing the bridge on Barakar River. According to the NHAI’s statistical record, in 2008 everyday about 850,000 to 900,000 vehicles plied between Barakar and Dankuni. The gross toll collection amounted to Rs 2,500,000 per day. Large number of buses ply along NH 2. South Bengal State Transport Corporation operates 47 buses between Durgapur and Kolkata alone. In 2008 South Bengal State Transport Corporation has started bus services between Burdwan and Kolkata.Both AC and non AC buses are available. There are around 50 buses. In 2011 Royal Express AC bus service was started between Burdwan and Kolkata.

National Highways Development Project
Almost all of the  stretch of NH 2 has been selected as a part of the Golden Quadrilateral by the National Highways Development Project.
Approximately  stretch of NH 2 between Delhi and Agra has been selected as a part of the North-South Corridor by the National Highways Development Project.
Approximately  stretch of NH 2 between Barah and Kanpur has been selected as a part of the East-West Corridor by the National Highways Development Project.

NH 2 પરના મુખ્ય શહેરો
 Delhi
Haryana
 Faridabad
 Palwal
Uttar Pradesh
 Mathura
 Agra
 Firozabad
 Etawah
 Auraiya
 Akbarpur
 Sachendi
 Panki
 Kanpur
 Kanpur Cantonment
 Jajmau
 Chakeri
 Rooma
 Maharajpur
 Bindki
 Fatehpur District
 Khaga
 Kaushambi
 Allahabad
 Varanasi
 Mughalsarai
Bihar
 Mohania
 Sasaram
 Dehri on sone
 Aurangabad
Jharkhand
 Barhi
 Dhanbad
West Bengal
 Asansol
 Durgapur
 Bardhaman
 Kolkata

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