The total road network in India is 63.32 lakh km comprising all categories of roads - national & state highways and urban & rural roads which is the second largest in the world. National Highways (NH) account for 2% of the total road network and carry over 40% of total traffic. The National Highways have a total length of 1, 44,955 km, which in totality serve as the arterial network of the country.Source: https://www.indianeconomy. net/economy/sectorslindia-is-the-sixth-largest-industrial-countryl
(a) Why transport network is compared to blood vessels in the body?
(b) National Highways (NH) account for nearly 2% of the total road network and carry over 40% of total traffic. State its effect.