These are main highways running through the length and breadth of the country connecting major ports, state capitals, large industrial and tourist centres, etc. National Highways in India are designated as NH followed by the highway number. The National Highways represent only 2% of the total network length, and they handle about 40% of the total road traffic. The National Highways are further classified based on the width of carriageway of the Highway.
The Expressways of India make up approximately 200 km (120 mi), of the Indian National Highway System. Indian Expressways are access controlled , feature a divider in the center and have at least six-lanes along with a shoulder on either side. Usually no two-wheelers, three-wheelers or tractor vehicles are allowed on these roads. Speeds of 120 km/h (75 mph) can be maintained on these roads due to separate merging lanes and the lack of speed breakers[clarification needed] so as to ensure smooth travel. Most of the existing expressways in India are toll roads. The National Highways Authority of India (NHAI) is the authority responsible for the development, maintenance and management of National Highways entrusted to it. The NHAI is currently
Main article: State Highway (India)
The State Highways provide linkages with the National Highways, district headquarters, important towns, tourist centres and minor ports and carry the traffic along major centers within the state. These arterial...