longest National Highway(NH) in India

The longest National Highway (NH) in India is(3745 km) long NH-44(Srinagar - kanyakumari). Earlier it was Nhi (Varanasi-Kanyakumari:- 2369 km). 

The new NH-44 is the Combination of NH- 1A, 1,2,3,7,26 and 75. 

It passes through 12 states J&k, HP, Punjab, Haryana, Delhi, UP, MP, Maharashtra, Telangana, Andhra Pradesh, KARNATAKA & Tamil Nadu.