National Highway 44 (NH 44) is the longest-running major north–south National Highway in India. It begins from Srinagar and terminates in Kanyakumari; the highway passes through the states of Jammu & Kashmir, Punjab, Haryana, Delhi, Uttar Pradesh, Madhya Pradesh, Maharashtra, Telangana, Andhra Pradesh, Karnataka, and Tamil Nadu.^[1] NH-44 was laid and is maintained by Central Public Works Department (CPWD).

It came into being by merging seven national highways, in full or part, starting with the Jammu-Srinagar National Highway (former NH 1A) from Srinagar in Jammu & Kashmir, former NH 1 in Punjab and Haryana ending at Delhi, part of former NH 2 starting from Delhi and ending at Agra, former NH 3 (popularly known as Agra-Bombay highway) from Agra to Gwalior, former NH 75 and former NH 26 to Jhansi, and former NH 7 via Lakhnadon, Seoni, Nagpur, Adilabad, Nirmal, Kamareddy, Hyderabad, Kurnool and Mahbubnagar, Anantapur,^[2] and Bangalore, Dharmapuri, Salem , Namakkal , Karur , Madurai, Kovilpatti and Tirunelveli terminating at Kanyakumari.

Delhi (Mubarka Chowk) to Panipat 70 km section is being upgraded, at the cost of INR2178.82 crore, to a barrier-free tolled expressway with 8 main lane and 4 (2+2) service lanes, 42% work of which was complete by June 2019.^[3]

The highway starts from Srinagar. The highway connects several cities and town such as Srinagar, Anantnag, Domel, Jammu, Pathankot, Jalandhar, Ludhiana, Ambala, Kurukshetra, Panipat, Sonipat, Delhi, Faridabad, Mathura, Agra, Gwalior, Jhansi, Sagar, Lakhnadon, Seoni, Nagpur, Adilabad, Hyderabad, Kurnool, Anantapur, Bengaluru, Salem, Namakkal , Karur, Dindigul Madurai, Tirunelveli and Kanyakumari. NH 44 covers the North-South Corridor of NHDP and it is officially listed as running over 3,745 km (2,327 mi) from Srinagar to Kanyakumari. It is the longest national highway in India.

Bengaluru–Hosur Road of this highway which connects the city of Bangalore capital of Karnataka, and the Tamil Nadu border City of Hosur in Krisnagiri district. It is a four- to six-lane highway which also has service lanes on either sides at the busier parts. Apart from being a part of the National Highway, the road is also significant because it consist of many industrial and IT business houses. The IT industrial park Electronics City is also located alongside Hosur Road.

The National Highways Authority of India has constructed a 10-kilometre-long (6.2 mi) elevated highway between Bommanahalli and Electronics City. This toll road has made travel to Electronics City a lot faster. The Bruhat Bengaluru Mahanagara Palike and Bengaluru Development Authority have planned a series of flyovers and underpasses to make this arterial road signal-free.^[4]