The correct option is C National highways
National
Highways are main highways running through the length and breadth of the
country connecting major ports, state capitals, large industrial and tourist
centers, etc. National Highways in India are designated as NH followed by the
highway number. The traffic on National Highways has been growing due to the
recent economic growth in India and the Government of India is taking steps to
improve management techniques to provide hindrance-free traffic movement by way
of widening roads, grade separation, construction of bypasses, bridges,
rail-road crossings, and utilizing the latest technologies. Even though the
National Highways represent only 2% of the total network length, they handle
about 40% of the total road traffic.