In Tamil Nadu, a separate Highways Department (HD) was established on April, 1946 and the same has been renamed as Highways & Minor Ports Department (HMPD) on 30 October 2008.[1] HMPD of Tamil Nadu is primarily responsible for construction and maintenance of roads including national highways, state highways and major district roads in Tamil Nadu. It operates through 7 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 31 districts with about 120 divisions and 450 subdivisions.[2]
As on 30 March 2010, Tamil Nadu's road network is widespread with a total road length of 1,99,040 km.[3] Tamil Nadu has about 14257 km of Highways network 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:
| Class | Length (km) |
|---|---|
| National highways/expressways | 4,873 |
| State highways | 9,384 |
| Total (approx) | 14,257 |
| Sl. No | Category wise | Single lane | Intermediate lane | Double lane | Multi lane | Total |
|---|---|---|---|---|---|---|
| 1 | National highways | 18 | 42 | 2685 | 2128 | 4873 |
| 2 | State highways | 32 | 1414 | 7261 | 677 | 9384 |
| 3 | Total (approx) | 50 | 1456 | 9946 | 2805 | 14257 |
| 4 | Percentage | Less than 1 | 1.022 | 69.76 | 19.6 | 100 |
Upgrade, resettlement, and repair work on rural roads, district roads, and state highways are undertaken by the Tamil Nadu Road Sector Project Wing of HMPD along with NHAI with the loan assistance of World Bank. On 17 June 2003, World Bank's regular lending arm, the International Bank for Reconstruction and Development has sanctioned US $ 348 million loan for road enhancement works in Tamil Nadu.[5]
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 / declared as National Highway by government of India.[6] In Tamilnadu, ‘’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).[7] 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 NH's runs inside the Tamil Nadu. NH 47, NH 49, NH 208, NH 220 connects Tamil Nadu with Kerala. NH 67, NH 207, NH 209 connects Tamil Nadu with Karnataka. NH 205, NH 219 and NH 234 connects Tamil Nadu with Andhra Pradesh. NH 4 connects Tamil Nadu with Maharashtra, Karnataka, and Andhra Pradesh. NH 5 connects Tamil Nadu with Orissa and Andhra Pradesh. NH 7 connects Tamil Nadu with Uttar Pradesh, Madhya Pradesh, Maharashtra, Andhra Pradesh, and Karnataka. NH 66 connects Tamil Nadu with Karnataka and Pondicherry. National Highways plying through Tamil Nadu are listed below in the table:[8]
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). Tamilnadu State Highways Network has 7 circles namely Chennai, Coimbatore, Salem, Trichy, Madurai, Tirunelveli, Tamil Nadu.[9]
| SH № | Name of the state highway | District(s) connected | Length (in km) |
|---|---|---|---|
| SH-1 | |||
| SH-2 | |||
| SH-3 | |||
| SH-4 | Arcot - Arni - Gingee - Villupuram Road | Vellore, Thiruvannamalai, Villupuram | 114.6 |
| SH-5 | Arcot - Thiruvettipuram - Vandavasi - Tindivanam Road | Vellore, Thiruvannamalai, Villupuram | 94.6 |
| SH-6 | Kallakurichi - Tiruvannamalai Road | Villupuram, Tiruvannamalai | 63.8 |
| SH-6A | Tiruvannamalai - Harur Road (via Thanipadi) | Dharmapuri,Thiruvannamalai | 80.0 |
| SH-7 | Villupuram - Mambalapattu - Tirukkovilur Road | Villupuram | 35.0 |
| SH-8 | Vikkiravandy - Panruti - Neyveli Township - Kumbakonam - Thanjavur Road (converted as NH-45C) | Villupuram, Cuddalore, Perambalur, Thanjavur | 159.2 |
| SH-9 | Cuddalore - Nellikuppam - Panruti - Thiruvamur - Madapattu - Thirukovilur - Tiruvannamalai - Polur - Vellore - Katpadi - Chittoor Road (Katpadi - Vellore - Thiruvannamalai. This part has been converted as NH 234) | 225.0 (T.N. 203, A.P. 22) | |
| SH-10 | Cuddalore - Vridhachalam - Salem Road | Cuddalore, Villupuram | 93.2 |
| SH-11 | |||
| SH-12 | |||
| SH-13 | |||
| SH-14 | |||
| SH-15 | Ooty - Kothagiri - Mettupalayam - Sathyamangalam - Gobichettipalayam - Erode | Nilgiris, Coimbatore, Erode | 161.6 |
| SH-16 | |||
| SH-17 | Malur - Hosur - Adiyamancottah Road | Krishnagiri, Dharmapuri | 101.8 |
| SH-18 | Salem - Thirupathur - Vaniyambadi Road | Salem, Dharmapuri, Krishnagiri, Vellore | 125.0 |
| SH-19 | Avinashi - Tirupur - Palladam - Pollachi - Cochin Road | Coimbatore | 99.6 |
| SH-20 | Thoppur - Mecheri - Mettur Dam - Bhavani (Erode) - Erode Road | Salem, Erode | 94.0 |
| SH-21 | Pollachi - Dharapuram - Mulanur - Karur Road | Coimbatore, Karur | 120.0 |
| SH-22 | Grand Anaicut - Cauveripattinam Road | Thanjavur, Nagapattinam | 125.0 (SH 100.6, MDR 24.4) |
| SH-23 | Mayiladuthurai - Thiruthuraipoondi Road | Nagapattinam, Thiruvarur | 68.2 |
| SH-24 | Trichy - Chidambaram Road (converted as NH-227) | Cuddalore, Ariyalur, Tiruchchirappalli | 135.4 |
| SH-25 | Trichy - Musiri -Namakkal-Thiruchencode Road | Tiruchchirappalli, Namakkal | 120.0 |
| SH-26 | Trichy - Pudukottai - Aranthangi - Mimisal Road | Tiruchchirappalli, Pudukkottai | 119.9 |
| SH-27 | Perambalur - Manamadurai Road (converted to NH-226) | Perambalur, Ariyalur, Thanjavur, Pudukkottai, Sivaganga | 228.1 |
| SH-28 | Thanjavur - Pattukkottai - Aranthangi - Karaikudi - Kallal - Kalayarkoil - Maravamangalam - Elayankudi - Paramakudi - Muthukulathur - Sayalkudi | Thanjavur, Pudukkottai, Sivaganga, Ramanathapuram | 248.2 |
| SH-29 | |||
| SH-30 | Musiri - Thuraiyur - Athur Road | Tiruchchirappalli, Salem | 61.0 |
| SH-31 | |||
| SH-32 | Madurai - Turicorin Road (upgraded as a part of NH-45B) | Madurai,Virudunagar,Tuticorin | 120.0 |
| SH-33 | Madurai - Thondi Road | Madurai, Sivaganga, Ramanathapuram | 96.0 |
| SH-34 | Ramanathapuram - Nainarkoil - Andakudi - Ilaiyangudi - Sivagangai - Melur Road | Madurai, Sivaganga, Ramanathapuram | 103.0 |
| SH-35 | Dindigul - Natham - Singampunari - Tiruppattur - Karaikudi Road | Dindigul, Madurai, Sivaganga | 94.4 |
| SH-36 | Dindigul - Vathalagundu - Theni (added to NH-45) - Cumbum - Kumuli Road (added to NH-220) | Dindigul, Theni | 73.4 |
| SH-37 | Mettur - Palakkanuthu - Oddanchatram - Palani - Dharapuram - Kangeyam - Arachalur - Erode Road | Dindigul, Tirupur, Erode | 158.9 |
| SH-38 | Aruppukottai - Perunali - Sayalgudi - Kaduguchandai - Maniyur - Valinokkam | Virudunagar, Ramanathapuram | 79.3 |
| SH-39 | Tirunelveli - Shencottai - Quilon Road | Tirunelveli | 73.0 |
| SH-40 | Tiruchendur - Palayamkottai - Ambasamudram - Tenkasi - Courtallam - Shencottah Road | Tuticorin, Tirunelveli | 130.0 |
| SH-41 | Rajapalayam - Sankarankoil - Tirunelveli Road | Virudunagar, Tirunelveli | 85.0 |
| SH-42 | Srivilliputhur - Sivakasi - Virudhunagar - Aruppukottai - Tiruchuli - Narikudi - Parthibanoor Road | Virudunagar, Ramanathapuram | 197.0 |
| SH-43 | Tenkasi - Madurai Road (upgraded as a part of NH - 208) | Tirunelveli, Virudunagar, Madurai | 137.0 |
| SH-44 | Paruvakudi - Kovilpatti - Ettayapuram - Vilathikulam - Vembar Road | Tirunelveli, Tuticorin | 95.0 |
| SH-45 | Aralvoimozhi - Nedumangadu Road | Kanniyakumari, Tirunelveli | 49.0 |
| SH-46 | Aralvoimozhi - Nagercoil - Rajakkamangalam - Colachel Road | Kanniyakumari | 42.0 |
| SH-47 | Parthibanur - Kamuthi - Aruppukottai Road | Ramanathapuram, Virudunagar | 41.7 |
| SH-48 | Tambaram - Medavakkam - Velachery Road | Chennai,Kancheepuram | 15.7 |
| SH-49 | Thiruvanmiyur - Mahabalipuram - Markanam - Pondicherry Road | Chennai, Kancheepuram, Villupuram | 147.8 |
| SH-50 | Thirumazhisai - Sathyavedu Road | Thiruvallur | 23.0 |
| SH-51 | Korathalaiyar bridge - Puthur Road | Thiruvallur | 32.2 |
| SH-52 | Kavarapettai - Sathiavedu Road | Thiruvallur | 20.1 |
| SH-53 | |||
| SH-54 | Chittoor - Thiruthani Road | Vellore, Thiruvallur | 66.0 (T.N.-49 km and A.P.-17 km) |
| SH-55 | Thomas Mount - Poonamallee - Avadi Road | Kancheepuram, Thiruvallur | 20.8 |
| SH-56 | Thiruvathiyur - Ponneri - Panchetty Road | Thiruvallur | 27.8 |
| SH-57 | Singaperumalkoil - Sriperumbadur - Thiruvallur - Redhills Road | Kancheepuram, Thiruvallur | 77.4 |
| SH-58 | Sadras - Chengalpattu - Kancheepuram - Arakonam - Thiruthani Road | Kancheepuram, Vellore, Thiruvallur | 107.4 |
| SH-59 | Thiruvallam - Katpadi - Vengadagirikottai Road | Vellore | 69.0 |
| SH-60 | Hogenakkal - Pennagaram - Dharmapuri - Thirupathur Road | Dharmapuri, Krishnagiri, Vellore | 96.6 |
| SH-60A | Dharmapuri - Harur Road | Dharmapuri | 39.0 |
| SH-61 | Walajah - Sholinghur - Arakonam Road | Vellore, Thiruvallur | 51.1 |
| SH-62 | Trichy - Thuraiyur Road | Tiruchchirappalli | 32.1 |
| SH-63 | Thanjavur - Mannargudy - Thiruthuraipoondi - Vedaranyam - Kodiakkarai Road | Thanjavur, Thiruvarur | 106.8 |
| SH-64 | Kumbakonam - Sirkali Road | Nagapattinam, Thanjavur | 53.4 |
| SH-65 | Thiruvarur - Kodavasal - Kumbakonam Road | Thiruvarur, Thanjavur | 37.2 |
| SH-66 | Kumbakonam - Mannargudi - Athirampattinam Road | Thanjavur, Thiruvarur | 75.2 |
| SH-67 | Nagore - Nannilam - Nachiyar koil Road | Nagapattinam, Thiruvarur, Thanjavur | 40.0 |
| SH-68 | Cuddalore - Palur - Panruti - Arasur - Tirukkovilur - Sankarapuram Road | Cuddalore, Villupuram | 104.0 |
| SH-69 | Virdhachalam - Ulundurpet - Villupuram Road | Cuddalore, Villupuram | 50.4 |
| SH-70 | Vridhachallam - Kammapuram - Bhuvanagiri - Parangipettai Road | Cuddalore | 50.2 |
| SH-71 | Musiri - Kulithalai - Manapparai - Pudukottai - Alangudi - Peravoorani - Sethubavachatram Road | Karur, Tiruchchirappalli, Pudukkottai, Thanjavur | 156.4 |
| SH-72 | Madurai - Natham Road | Madurai, Dindigul | 35.6 |
| SH-73 | Thirumangalam - Pallapatti Road | Madurai | 37.1 |
| SH-74 | Dindigul - Guziliamparai - Karur Road | Dindigul, Karur | 80.8 |
| SH-75 | Palayamkottai - Kurukkuchalai - Kolathur - Vilathikulam - Nagalapuram - panthalkudi - Aruppukottai Road | Tirunelveli, Tuticorin, Virudunagar | 108.0 |
| SH-76 | Puliankudi - Sankarankoil - Kalugumalai - Nalatinputhur Road | Tirunelveli, Tuticorin | 49.0 |
| SH-77 | Kovilpatti - Ottapidaram - Pudukottai - Eral - Mukkani Road | Tuticorin | 76.0 |
| SH-78 | Pollachi - Valaparai Road | Coimbatore | 64.0 |
| SH-79 | Athur - Mallikkarai - Rasipuram - Tiruchengode - Erode Road | Salem, Namakkal, Erode | 98.9 |
| SH-79A | Sankagiri - Pallipalayam (Erode) Road | Salem, Namakkal, Erode | 15.9 |
| SH-80 | Avinashi - Annur - Mettupalayam Road | Tirupur, Coimbatore | 42.0 |
| SH-81 | Gobichettipalayam - Uthukuli - Kangeyam - Dharapuram | Erode, Tirupur | 56.8 |
| SH-82 | Sathyamangalam - Athani - Aapakoodal - Bhavani Road | Erode | 52.8 |
| SH-83 | Palani - Dharapuram Road | Dindigul, Tirupur | 30.9 |
| SH-83A | Swastik Circle - Surampatti 4 Roads - Junction - Bullfight Circle - Old Railway Station Road | Erode | 4.8 |
| SH-84 | Erode - Unjalur - Kodumudi - Karur Road | Erode,Karur | 60.0 |
| SH-84A | Erode (Solar) - Modakurichi - Sivagiri (Vilakethi) - Muthur - Velakoil - Mulanur Road | Erode,Tirupur | 68.0 |
| SH-84B | Sivagiri (Vilakethi) - Anjur - Karvazhii - Chinna Dharapuram - Aravakurichi - Pallapatti - Vedasandur - Dindigul Road | Erode, Karur, Dindigul | 84.0 |
| SH-85 | Rayakottai (Rayakottah)- Athipalli Road | Krishnagiri, Bangalore(Rural) | 35.0 |
| SH-86 | Omalur - Sankari - Tiruchengode - Paramathy Road | Salem,Namakkal | 81.0 |
| SH-86A | Ariyanoor (Salem) - Mallasamudram - Tiruchengode | Salem, Namakkal | 33 |
| SH-87 | Udumalpet - Dharapuram Road | Coimbatore, Tirupur | 19.4 |
| SH-88 | Chittoor - Gudiyatham Road | Vellore | 41.0 (T.N.-21 km and A.P.-20 km) |
| SH-89 | Nanguneri - Bharathar Ovari Road | Tirunelveli | 35.0 |
| SH-90 | Marthandam - Pechiparai Road | Kanniyakumari | 20.0 |
| SH-91 | Parasery - Monday Market - Pudukkadai Road | Kanniyakumari | 25.0 |
| SH-92 | Nanguneri - Eruvadi - Valliyoor - Vijayapathi Road | Kanniyakumari | 41.0 |
| SH-93 | Alwarthirunagari - Nazareth - Sathankulam - Ittamozhi - Valliyoor Road | Tuticorin, Tirunelveli | 60.0 |
| SH-94 | Tiruchengode - Namakkal Road | Namakkal | 30.9 |
| SH-95 | Mohanur - Namakkal - Sendamangalam - Rasipuram Road | Namakkal | 54.0 |
| SH-96 | Erode - Perundurai - Chennimalai - Kangeyam Road | Erode, Tirupur | 51.6 |
| SH-97 | Udumalpet - Palladam Road | Tirupur, Coimbatore | 45.0 |
| SH-98 | |||
| SH-99 | Thirukattupalli - Sengipatti - Pattukkottai Road | Thanjavur, Pudukottai | 71.4 |
| SH-100 | Palayam - Bodi Road | Theni | 31.8 |
| SH-101 | Vaigai dam - Varusanadu Road | Theni | 35.6 |
| SH-102 | Palayam - Surulipatti Road | Theni | 20.0 |
| SH-103 | |||
| SH-104 | Chennai - Pulicat Road | Chennai, Thiruvallur | 25.5 |
| SH-105 | Kanagamma Chathiram - Thakkolam Road | Thiruvallur, Vellore | 18.5 |
| SH-106 | Thiruthani - Podatturpet - Pallipet Road | Thiruvallur | 30.2 |
| SH-107 | Minjur - Kattur - Thirupalaivanam Road | Thiruvallur | 17.2 |
| SH-108 | R.K.Pet - Pallipet Road | Thiruvallur | 19.6 |
| SH-109 | Pallavaram - Thuraipakkam Road | Kancheepuram | 10.6 |
| SH-110 | Tambaram - Mudichur - Sriperumbudur Road | Kancheepuram | 23.5 |
| SH-111 | Madavaram - Redhills Road | Thiruvallur | 9.6 |
| SH-112 | Thirumangalam - Mugappair Road | Thiruvallur | 2.3 |
| SH-113 | Kodambakkam - Sriperumbudur Road | Chennai, Thiruvallur | 28.8 |
| SH-114 | Chennai - Ennore Road | Chennai, Thiruvallur | 10.4 |
| SH-115 | Cheyyur - Vandawasi - Polur Road | Kancheepuram, Thiruvannamalai | 105.0 |
| SH-116 | Kanchipuram - Vandavasi Road | Kancheepuram, Thiruvannamalai | 39.8 |
| SH-117 | Madurantakam - Vennangupet Road | Kancheepuram | 37.6 |
| SH-118 | Bukkathurai - Uthiramerur Road | Kancheepuram | 31.8 |
| SH-119 | Km.11/8 of.C.K.A.T to Pudupattinam Road (v) Vitalapuram | Kancheepuram | 17.4 |
| SH-120 | Walajabad - Sunguvarchathiram - Keelachery Road | Kancheepuram | 27.6 |
| SH-121 | Vandalur - Mambakkam - Kelambakkam Road | Kancheepuram | 18.6 |
| SH-122 | Abdullapuram - Asanampattu - Alangayam - Thirupathur Road | Vellore | 79.5 |
| SH-123 | Kalavai - Valapandal Road | Vellore | 21.2 |
| SH-124 | Ponnanai - Thiruvalam Road | Vellore | 16.4 |
| SH-125 | Panamadangi - Poosarivalasai Road | Vellore | 19.6 |
| SH-126 | Arakkonam - Ocheri Road | Vellore | 32.0 |
| SH-127 | Pallikoda - Palamaneri Road | Vellore | 28.8 |
| SH-128 | Sholinghur - Kaveripakkam Road | Vellore | 30.0 |
| SH-129 | Arcot - Kannamangalam Road | Vellore, Thiruvannamalai | 25.4 |
| SH-130 | Gudiyatham - Gadambur - Kailasagiri - Vanniyambadi Road | Vellore | 41.4 |
| SH-131 | Barghur - Thirupathur Road | Krishnagiri, Vellore | 24.2 |
| SH-132 | Kannamangalam - Arni Road | Thiruvannamalai | 17.2 |
| SH-133 | Polur - Chengam Road | Thiruvannamalai | 47.0 |
| SH-134 | Tindivanam - Marakkanam Road | Villupuram | 34.0 |
| SH-135 | Villupuram - Tiruvannamalai Road | Villupuram, Thiruvannamalai | 54.4 |
| SH-136 | Mailam - Pondicherry Road | Villupuram | 26.6 |
| SH-137 | Tirukoilur - Asanur Road | Villupuram | 39.3 |
| SH-138 | Jail Hills - Vellakarai - Kumalankulam Road | Cuddalore | 18.9 |
| SH-139 | Ariyalur - Muttuvancheri - Govindaputhur Road | Perambalur | 35.2 |
| SH-140 | Km. 6/8 of Vridhachalam - Tholudur Road to Madhanathur Road (via) Jayakondam | Cuddalore, Perambalur | 48.6 |
| SH-141 | Vridhachalam - Tholudur Road | Cuddalore | 44.4 |
| SH-142 | Thuraiyur - Perambalur Road | Tiruchchirappalli, Perambalur | 39.4 |
| SH-143 | Mathur - Thittakudi Road | Perambalur, Cuddalore | 26.0 |
| SH-144 | Kodukkur - Kaduvetti Road | Perambalur | 30.2 |
| SH-145 | Aranthangi - Kattumavadi Road | Pudukkottai | 25.8 |
| SH-146 | Mannargudi - Pattukkottai - Sethubhavachatram Road | Tiruvarur, Thanjavur | 51.2 |
| SH-147 | Kumbakonam - Karaikal Road | Thanjavur, Nagapattinam, Thiruvarur | 42.2 |
| SH-148 | Nagore - Vettar Road | Nagapattinam | 23.0 |
| SH-149 | Sembanarkoil - Nalladai Road | Nagapattinam | 11.9 |
| SH-150 | Vaitheeswarankoil - Lower Anaicut Road | Nagapattinam, Thanjavur | 32.3 |
| SH-151 | Kilvelur - Katchanam Road | Nagapattinam, Thiruvarur | 20.4 |
| SH-152 | Vadamadurai - Oddanchatram | Dindugal | 42.8 |
| SH-153 | Palani - Dharapuram Road (via) Alangiyam | Dindugal, Tirupur | 32.1 |
| SH-154 | Vathalagundu - Peraiyur - T.Kallupatti Road | Dindugal, Madurai | 58.2 |
| SH-155 | Ammaiyanaickanur - Vathalagundu Road | Theni,Dindugal | 18.0 |
| SH- 156 | Kodai Ghat Road | Dindugal | 52.4 |
| SH-157 | Perambalur - Athur Road | Perambalur, Salem | 26.2 |
| SH-158 | Salem Thermal Power Plant Road (via) Thangamapuripattinam | Salem | 5.4 |
| SH-159 | Pallapatti - Suramangalam Road | Salem | 2.0 |
| SH-160 | Ayothiyapattinam - Belur - Kilakkadu Road | Salem, Villupuram | 54.6 |
| SH-161 | Namakkal - Kanannur Road | Namakkal, Tiruchchirappalli | 45.4 |
| SH-162 | North Coimbatore Junction - Ramanathapuram Road - Chettipalayam Road (via) Lakshmi Mills Junction. | Coimbatore | 18.9 |
| SH-163 | Palladam - Cochin Frontier Road | Coimbatore | 54.4 |
| SH-164 | Coimbatore(Gandhipark) - Aanaikatti Road | Coimbatore | 29.0 |
| SH-165 | Kamanaikenpalayam - Somanur - Karumathampatti - Annur | Coimbatore rural | 38.4 |
| SH-166 | Palladam - Avinashi Road | Coimbatore | 22.8 |
| SH-167 | North Coimbatore Junction - Maruthamalai Road | Coimbatore | 11.2 |
| SH-168 | Karamadai - Kariyampalayam Road | Coimbatore | 15.2 |
| SH-169 | Tirupur - Somanur Road | Coimbatore | 19.0 |
| SH-170 | Nellipalayam - Sirumugai Road | Coimbatore | 17.8 |
| SH-171 | Kovilvalli - Karappalayam Road | Coimbatore | 17.4 |
| SH-172 | Tirupur - Padiyur(Kangeyam) Road | Tirupur | 15.2 |
| SH-173 | Erode - Kokarayanpet - Solasiramani - Paramathi - Velur Road | Namakkal | 50.6 |
| SH-174 | Dharapuram - Tirupur Road | Tirupur | 44.8 |
| SH-175 | Bhavani - Anthiyur - Bargur - Kollegal Road | Erode | 69.2 |
| SH-176 | Thoothukudi - Tiruchendur - Kanyakumari Road | Thoothukudi, Kanyakumari | 119.2 |
| SH-177 | Cheranmahadevi - Panagudi Road | Tirunelveli | 43.4 |
| SH-178 | Ambasamudram - Papanasam - Upper Dam Road | Tirunelveli | 23.0 |
| SH-179 | Kanyakumari - Pazhaya - Uchakadai Road | Kanyakumari | 71.5 |
| SH-180 | Colachel - Thiruvattar Road | Kanyakumari | 23.9 |
| SH-181 | Marthandam - Panachamoodu Road | Kanyakumari | 14.1 |
| SH-182 | Watrap - Maharajapuram - Alagapuri - Virudhunagar Road | Virudhunagar | 37.4 |
| SH-183 | Sivakasi - Alangulam Road | Virudhunagar | 15.0 |
| SH-184 | Virudhunagar - Krishnapuram Road | Virudhunagar | 23.2 |
| SH-185 | Viswanatham - Venkatachalapuram Road | Virudhunagar | 16.1 |
| SH-186 | Rajapalayam - Vembakottai Road | Virudhunagar | 29.6 |
| SH-187 | Sattur - Sivakasi - Kalukumalai Road | Virudhunagar | 38.4 |
| SH-188 | Salem - Yercaud Road | Salem | 30.0 |
| SH-189 | Kangeyam - Muthur - Kodumudi Road | Tiruppur, Erode | 39.0 |
| SH-190 | Karumandampalayam (Erode) - Vellotamparappu - Thamaraipalayam - Othakadai - Thennilai Road | Erode, Karur | 43.4 |
| SH ? | Nagapattinam - Coimbatore - Gudalur - Mysore Road (converted as NH-67) | Nagapattinam, Thiruvarur, Thanjavur, Tiruchchirappalli, Karur, Erode, Coimbatore, Nilgiris | 501.9 |
| SH ? | Calicut - Vythiri - Gudalur Road | Nilgiris | 134.4 (TN: 38, KL: 96.4) |
| SH ? | Gudalur - Sulthan Bathery Road | Nilgiris | 27.4 |
| SH ? | Chennai GNT Road | Chennai, Thiruvallur | 46.6 |
| SH ? | Chennai GST Road (converted as NH-45) | Chennai, Kancheepuram, Villupuram, Cuddalore, Perambalur, Thiruchchirappalli, Dindigul | 421.4 |
| SH ? | Chennai - Tiruttani - Renigunta Road (upgraded as a part of NH-205 [Chennai-Ananthapur National Highway]) | Chennai,Thiruvallur | 85.2 |
| SH ? | Krishnagiri - Ranipet Road (converted as NH-46) | Krishnagiri, Vellore | 144.4 |
| SH ? | Salem - Coimbatore - Cochin road (upgraded as a part of NH-47 [Salem - Coimbatore- Cochin - Kanyakumari National Highway]) | Salem, Erode, Coimbatore | 171.2 |
| SH ? | Dindigul - Coimbatore - Bangalore Road (converted as NH-209) | Dindigul, Coimbatore, Erode | 262.4 |
| SH ? | Madurai - Dhanushkodi Road (converted as NH-49) | Madurai, Sivagangai, Ramanathapuram | 177.0 |
| SH ? | Madurai - Cochin Road (added to NH-49) | Madurai, Theni | 94.0 |
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