Longest Highway In India: India has about 66.71 lakh km of road network, including 1,46,145 km of National Highways, 1,79,535 km of State Highways, and 63,45,403 km of other roads in 2023. Longest Highway In India: India has about 66.71 lakh km of road network, including 1,46,145 km of National Highways, 1,79,535 km of State Highways, and 63,45,403 km of other roads in 2023. Zee News :Business