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Grand Southern Trunk Road or National Highway 45 is an arterial road in the Indian state of
Tamil Nadu Tamil Nadu (; , TN) is the southernmost States and union territories of India, state of India. The List of states and union territories of India by area, tenth largest Indian state by area and the List of states and union territories of Indi ...
. It is also known as Chennai–Perambalur-Trichy-Dindigul-Theni Highway. The road starts from Kathipara Junction in
St Thomas Mount Parangimalai (known in English as St. Thomas Mount) is a small hillock in the Chennai district of Tamil Nadu, India, near the neighbourhood of Guindy and very close to Chennai International Airport. By extension, it is also the name of the nei ...
,
Chennai Chennai, also known as Madras (List of renamed places in India#Tamil Nadu, its official name until 1996), is the capital city, capital and List of cities in Tamil Nadu by population, largest city of Tamil Nadu, the southernmost states and ...
towards
Perambalur Perambalur is a City Municipal corporation which is located in the heart of Tamil Nadu and is 267 kilometers South of the capital city of Chennai. The district covers an area of 1,757 square kilometers, located between 10.54' and 11.30' degrees ...
,
Trichy Tiruchirappalli (), also known as Trichy, is a major tier II city in the Indian state of Tamil Nadu and the administrative headquarters of Tiruchirappalli district. The city is credited with being the best livable and the cleanest city of T ...
,
Dindigul Dindigul (ISO 15919, ISO: ) is a city in the India, Indian state of Tamil Nadu. It is the administrative headquarters of the Dindigul district. Dindigul City is Located in the Southwest Region of Tamil Nadu. Dindigul is an ancient settlement r ...
and
Theni Theni is a valley town situated in the Indian state of Tamil Nadu at the foothills of the Western Ghats. It is the headquarters of the Theni district, 70km from Madurai Madurai ( , , ), formerly known as Madura, is a major city in th ...
. It branches out from
Anna Salai Anna Salai (), named for C. N. Annadurai, formerly known as St. Thomas Mount Road or simply Mount Road, is an arterial road in Chennai, India. It starts at the Cooum Creek, south of Fort St George, leading in a south-westerly direction towa ...
(previously known as Mount Road). The road runs through important localities like
Meenambakkam Meenambakkam is a southern neighbourhood of Chennai in the Indian state of Tamil Nadu. It is home to Chennai International Airport, the Airports Authority of India regional office, and the DGQA Complex. It was under the reign of the Pallava ki ...
,
Pallavaram Pallavaram (originally Pallavapuram) is a southern suburb of Chennai, India. It lies in the district of Chengalpattu, situated within the Chennai Metropolitan Area, Tamil Nadu state. Formerly a Municipality under Alandur taluk, it was ...
, Kadaperi,
Tambaram Tambaram is a city located within the Chennai Metropolitan Area in the Indian State of Tamil Nadu. The city is governed by Tambaram City Municipal Corporation. Etymology Tambaram is an ancient town referred to as Taamapuram in an inscrip ...
,
Vandalur Vandalur is a suburb of the city of Chennai and a taluk in Chengalpattu district. The Arignar Anna Zoological Park is situated in the locality. The area is served by Vandalur railway station of the Chennai Suburban Railway network. Locati ...
,
Kilambakkam Kilambakkam is a suburban locality in Chennai, Tamil Nadu, India. It is located between Vandalur and Urapakkam along Grand Southern Trunk Road (GST Road). It is the entrance gateway for the Chennai City from the southern end. CMDA is constru ...
,
Guduvanchery Guduvancheri is a southern suburb of the Indian city of Chennai. It forms part of the Nandivaram-Guduvancheri municipality in Chengalpattu district. As per the 2011 census, Guduvancheri had a population of 44,098 individuals. It forms part of ...
,
Paranur Paranur is a village in India near the busy GST Road or National Highway 45. It has a railway station and few hundred houses, and is 44 km from Chennai International Airport in Tirusulam. Paranur comes under Panchayat union/block of Kat ...
,
Chengalpattu Chengalpattu, previously known as Chingleput or Chengalpet, is a town and the headquarters of Chengalpattu district of the state Tamil Nadu, India. The town is located near to the industrial and IT hub. It is the headquarters of the district a ...
,
Madurantakam Madurantakam () is the southernmost suburb of Chennai city and a municipality in Chengalpattu district in the Indian state of Tamil Nadu. The town is known for the artificial and second largest lake in Tamil Nadu, the Madurantakam lake. It is ...
,
Tindivanam Tindivanam is a municipality in Viluppuram district in the Indian States and territories of India, state of Tamil Nadu. It is the second largest town in Villupuram District after the headquarters town Villupuram. Important roads from north to s ...
,
Villupuram Viluppuram, Villupuram, or Vizhuppuram () is a municipality and the administrative headquarters of Viluppuram district. Located south west of a Tiruvannamalai and north west of Cuddalore null The town serves as a major and largest railway ...
,
Vikravandi Vikravandi is a town in Viluppuram district in the Indian state of Tamil Nadu. Geography Vikravandi is located at . It has an average elevation of 44 metres (144 feet). The National Highway NH 132 connects Villupuram and Tindivanam, ...
,
Ulundurpet Ulundurpettai or Ulundurpet is a municipality in Ulundurpet taluka of Kallakurichi district of Tamil Nadu, India. It is at the intersection of NH 68 and NH 45 located 205 km from Chennai and 129 km from Tiruchirappalli. Ulundurpe ...
,
Perambalur Perambalur is a City Municipal corporation which is located in the heart of Tamil Nadu and is 267 kilometers South of the capital city of Chennai. The district covers an area of 1,757 square kilometers, located between 10.54' and 11.30' degrees ...
,
Trichy Tiruchirappalli (), also known as Trichy, is a major tier II city in the Indian state of Tamil Nadu and the administrative headquarters of Tiruchirappalli district. The city is credited with being the best livable and the cleanest city of T ...
,
Dindigul Dindigul (ISO 15919, ISO: ) is a city in the India, Indian state of Tamil Nadu. It is the administrative headquarters of the Dindigul district. Dindigul City is Located in the Southwest Region of Tamil Nadu. Dindigul is an ancient settlement r ...
, and
Theni Theni is a valley town situated in the Indian state of Tamil Nadu at the foothills of the Western Ghats. It is the headquarters of the Theni district, 70km from Madurai Madurai ( , , ), formerly known as Madura, is a major city in th ...
.


Major junctions

Chennai City *
Mount-Poonamallee Road St. Thomas Mount-Poonamallee Road, popularly known as the Mount-Poonamallee Road (SH-55), is an arterial road in the city of Chennai, India. It runs for 11 kilometres from Kathipara Junction to the National Highway 4 (India, old numbering), NH ...
near Kathipara Junction * Mount-Medavakkam High Road in St.Thomas Mount * Pallavaram-Kundrathur-Poonamallee Road (Pammal Main Road) in
Pallavaram Pallavaram (originally Pallavapuram) is a southern suburb of Chennai, India. It lies in the district of Chengalpattu, situated within the Chennai Metropolitan Area, Tamil Nadu state. Formerly a Municipality under Alandur taluk, it was ...
* Pallavaram-Thiruneermalai Road in
Pallavaram Pallavaram (originally Pallavapuram) is a southern suburb of Chennai, India. It lies in the district of Chengalpattu, situated within the Chennai Metropolitan Area, Tamil Nadu state. Formerly a Municipality under Alandur taluk, it was ...
* Pallavaram-Thuraipakkam Radial Road in
Pallavaram Pallavaram (originally Pallavapuram) is a southern suburb of Chennai, India. It lies in the district of Chengalpattu, situated within the Chennai Metropolitan Area, Tamil Nadu state. Formerly a Municipality under Alandur taluk, it was ...
* Chitlapakkam and Hasthinapuram Main Road near MIT Bridge Along GST Road * Gandhi Road in
Tambaram Tambaram is a city located within the Chennai Metropolitan Area in the Indian State of Tamil Nadu. The city is governed by Tambaram City Municipal Corporation. Etymology Tambaram is an ancient town referred to as Taamapuram in an inscrip ...
* Velachery Main Road and Mudichur Road in
Tambaram Tambaram is a city located within the Chennai Metropolitan Area in the Indian State of Tamil Nadu. The city is governed by Tambaram City Municipal Corporation. Etymology Tambaram is an ancient town referred to as Taamapuram in an inscrip ...
* Chennai Bypass Road in Irumbuliyur * Chennai Outer Ring Road in
Vandalur Vandalur is a suburb of the city of Chennai and a taluk in Chengalpattu district. The Arignar Anna Zoological Park is situated in the locality. The area is served by Vandalur railway station of the Chennai Suburban Railway network. Locati ...
* Vandalur-Kelambakkam Road in
Vandalur Vandalur is a suburb of the city of Chennai and a taluk in Chengalpattu district. The Arignar Anna Zoological Park is situated in the locality. The area is served by Vandalur railway station of the Chennai Suburban Railway network. Locati ...
* Guduvancheri Tiruporur road Outside Chennai * Kotteripattu Near Tindivanam


Developments

# NHAI to repair Palar Bridge in Grand Southern Trunk Road near Chengalpattu. # Double Deck Structure proposed between Airport and Irumbuliyur along GST Road. # NHAI set to rectify 18 accident-prone spots in GST Road.


References

Roads in Tamil Nadu Tambaram {{India-road-stub