Golden Quadrilateral comprises the national highways connecting Delhi-Mumbai-Chennai-Kolkata by a $$6$$-lane super highway. It has a total length of $$5846$$km. Two ways it will help in the economic development of the country are: (i) India is a land of vast distances from north-south as well as from east-west. This forms an integrated transport system and brings different people together.  (ii) Cities lying close to these roads will also be well developed and enhance the growth of our country.