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National Highway in Tamil Nadu, India

National Highway 179D shield}}
National Highway 179D
Map of the route
Route information
Length5 km (3.1 mi)
Major junctions
North endSemmampadi
South endChetpet
Location
CountryIndia
StatesTamil Nadu
Highway system
NH 179C NH 179E

National Highway 179D (NH 179D) is a short spur road of National Highway 179B located entirely in the state of Tamil Nadu, India.[1] The highway serves as a connector route in the northern part of the state and forms part of the proposed network associated with the Chennai–Salem greenfield corridor. NH 179D provides local access between Semmampadi and Chetpet and links regional traffic to the larger national highway.[2]

Route

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NH 179D begins at its junction with NH 179B near Semmampadi in Tiruvannamalai district.[3] From there, it travels southward for approximately 5 km, passing through rural areas before terminating at Chetpet. The route primarily serves local and intra‑district connectivity.[4]

Background

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The highway was notified as part of the rationalization and expansion of the national highway network in Tamil Nadu.[5] Its designation supports planned improvements to regional mobility and provides a feeder link to the proposed Chennai–Salem Expressway corridor, intended to enhance long‑distance travel between northern Tamil Nadu and the state capital.[6]

Junctions

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The following are the major junctions along NH 179D[7]

Location km Junction
Semmampadi 0.0 Start
Chetpet 5.0 Terminal point

References

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  1. "Rationalisation of Numbering Systems of National Highways" (PDF). Ministry of Road Transport and Highways, Government of India. 2010. Retrieved 11 February 2026.
  2. "New National Highways in Tamil Nadu – NH 179B, NH 179C, NH 179D" (PDF). Ministry of Road Transport and Highways, Government of India. 2017. Retrieved 11 February 2026.
  3. "National Highways in Tamil Nadu – Unstarred Question No. XXXX". Lok Sabha Secretariat. 2018. Retrieved 11 February 2026.
  4. "Numbering Highways". Notes and Queries. 14 (4): 146–b–146. 1 April 1967. doi:10.1093/nq/14-4-146b. ISSN 1471-6941.
  5. "Centre pushes ahead with Chennai–Salem greenfield corridor". The Hindu. June 2018. Retrieved 11 February 2026.[failed verification]
  6. "Road Infrastructure Projects in Tiruvannamalai District". Highways and Minor Ports Department, Government of Tamil Nadu. Retrieved 11 February 2026.
  7. "Tamil Nadu to get new national highways under Centre's expansion plan". The Times of India. 2017. Retrieved 11 February 2026.[failed verification]