As of June 2017 , approximately 23 kilometers of highway construction was done across India. The total length of national highways across India was over 120 thousand kilometers in 2017 . There are over 200 national highways in the nation which control about 40 percent of the road traffic. The highways, however, make up a share of less than two percent of all Indian roads. The National Highway Authority of India is responsible for the maintenance and new construction of the country's highway network.