Highways of Tamil Nadu

In Tamil Nadu, the Highways & Minor Ports Department (HMPD) is primarily responsible for construction and maintenance of roads including national highways, state highways and major district roads. HMPD was established as Highways Department (HD) in April 1946 and subsequently renamed on 30 October 2008. It operates through seven wings namely National Highways Wing, Construction & Maintenance Wing, NABARD and Rural Roads Wing, Projects Wing, Metro Wing, Tamil Nadu Road Sector Project Wing, Investigation and Designs Wing geographically spread across the state in 32 districts with about 120 divisions and 450 subdivisions.

As on 30 March 2017, Tamil Nadu's road network has a total road length of 199,040 km (123,680 mi). Tamil Nadu has about 17,089 km (10,619 mi) of highways which is designated as National Highways and State Highways on the basis of traffic intensity and connectivity. The various types of roads and their lengths are given below:

Road stretches which have heavy traffic intensity of more than 30,000 Passenger Car Units (PCUs) connecting different state capitals, major ports, large industrial areas and tourist centers are designated National Highway by Government of India. In Tamil Nadu, National Highways Wing of Highways & Minor Ports Department was established in the year 1971 to look after the works of improving, maintaining and renewing of National Highways laid down by National Highways Authority of India (NHAI). National Highways wing exercises central government funds from Ministry of Road Transport and Highways for improvement works. Out of 25 National Highways in Tamil Nadu, 12 highways completely lie within the state. National Highways plying through Tamil Nadu are listed below in the table:

Road stretches with heavy traffic intensity of more than 10,000 PCUs but less than 30,000 PCUs which connects district headquarters, important towns and the National Highways in the State and neighboring States are declared as State Highways. Construction & Maintenance wing of Highways Department looks after Construction, Maintenance of all the State Highways (SH), Major District Roads (MDR), Other District Roads (ODR). Tamil Nadu State Highways Network has 7 circles namely Chennai, Villupuram, Madurai, Salem, Tiruchirappalli, Coimbatore, Tirunelveli.

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