Highway 403 is a road in Thailand that is divided into 3 sections. The first section starts at Amphoe Mueang Nakhon Si Thammarat. It goes south-westward and join Route 41 at Suan Pak junction. The 2nd section starts at Chong Khao junction. It goes westward to Amphoe Thung Song, then goes southward and join with Route 4 near Amphoe Huai Yot. The 3rd sections starts at Amphoe Mueang Trang. It goes south-westward and ends at Amphoe Kantang
Route 403 is main road that connect Nakhon Si Thammarat and Trang. The 1st section starts at Hua Thanon junction in Amphoe Mueang Nakhon Si Thammarat. The junction also the start of Route 408 and route 4013. All of first section is 4-land (2 lane per direction) asphalt with island as median between direction. It goes south-westward with almost level. It joins Route 41 at Suan Pak junction. Total length is about 35 km.
Second section starts at Chong Khao junction. It separate from Route 41 on the north. It goes westward parallel to Route 41. First few kilometer of this section is 2-lane asphalt and run along hill shoulder. Then, it is widen to 4-lane and goes into Amphoe Thung Song. It turns left to the south, pass Route 41 and goes into Trang Province. It finally ends by joining with Route 4 near Amphoe Huai Yot. Total length is about 44 km.
Third section start at Amphoe Mueang Trang. It goes south-westward and ends at Amphoe Kantang. Total length is about 20 km.
Originally, the first and second sections were connected. However, when Route 41 section Surat Thani - Thung Song - Phatthalung was constructed, Route 403 from Suan Pak junction to Chong Khao junction, which is the section that cross the mountain, was reassign as part of Route 41.
Trang, also called Mueang Thap Thiang, is one of the southern provinces (changwat) of Thailand, on the west side of the Malay Peninsula facing the Strait of Malacca. Neighboring provinces are Krabi, Nakhon Si Thammarat, Phatthalung, and Satun.
Nakhon Si Thammarat province is a province (changwat) of Thailand, on the western shore of the Gulf of Thailand. As of 2018, it was the most populous province of Southern Thailand, with a population of approximately 1.5 million. Neighboring provinces are Songkhla, Phatthalung, Trang, Krabi and Surat Thani.
Kanchanadit is a district (amphoe) in Surat Thani province, south Thailand.
Southern Thailand, Southern Siam or Tambralinga is a southernmost cultural region of Thailand, separated from Central Thailand region by the Kra Isthmus.
Wiang Sa is a district (amphoe) of Surat Thani province, Thailand.
Highway 401 is a national highway in Southern Thailand. It starts from the west coast of the Thai-Malay Peninsula at an intersection with Phetkasem Road near Amphoe Takua Pa, Phang Nga Province.
Highway 41 starts at intersection with Route 4 in Chumphon Province. It goes southward passing through Surat Thani Province and Nakhon Si Thammarat Province. It ends at Phatthalung Province joining Route 4 again.
Bang Khan is a district (amphoe) of Nakhon Si Thammarat province, southern Thailand.
Cha-uat is a district (amphoe) in the southern part of Nakhon Si Thammarat province, southern Thailand.
Highway 44 is part of land bridge project running across the Kra Isthmus. It starts at intersection with Phetkasem highway in Krabi Province, running northeast, and ends at intersection with Highway 401 in Surat Thani Province. It roughly follows the route that a centuries-discussed Thai Canal might follow, if ever built.
Thung Song is a district (amphoe) in the southwestern part of Nakhon Si Thammarat province, southern Thailand.
Huai Yot is a district (amphoe) in the northern part of Trang province, Thailand.
Mueang Trang, also Mueang Thap Thiang, is the capital district of Trang province, Thailand. The city has a population of 59,637 (2005) and covers tambon Thap Thiang of Mueang Trang District.
Southern Line is a metre-gauge railway line in Thailand, operated by State Railway of Thailand (SRT), which runs through most of the provinces in the Central, Western, and Southern regions of Thailand. At 1,144.29 kilometres in length, it is Thailand's longest railway line.
Chumphon railway station is a railway station in Tha Taphao Subdistrict, Chumphon City, and is the main railway station for Chumphon Province. It is a class 1 railway station, 468.534 km (291.1 mi) from Thon Buri railway station. It is the first fueling station from Bangkok, and thus all trains going further south must stop here. Chumphon is also the site of a locomotive depot.
Thung Song Junction railway station is a railway station located in Pak Phraek Subdistrict, Thung Song District, Nakhon Si Thammarat. This station is a class 1 railway station, located 757.08 km (470.4 mi) from Thon Buri railway station. This station is the junction for the Southern Line mainline and the Kantang Branch Line to Trang Province. On site, there is a 277 class decommissioned steam locomotive, built by Hanomag.
Khao Chum Thong Junction railway station is a railway station located in Khuan Koei Subdistrict, Ron Phibun District, Nakhon Si Thammarat. The station is a class 2 railway station, located 781.018 km (485.3 mi) from Thon Buri railway station. This station is the junction for the Southern Line mainline and the Nakhon Si Thammarat Branch Line.
Khao Chaison railway station is a railway station located in Khao Chaison Subdistrict, Khao Chaison District, Phatthalung. It is a class 2 railway station located 865.018 km (537.5 mi) from Thon Buri railway station
Ban Huai Taen Halt is a railway halt located in Han Pho Subdistrict, Khao Chaison District, Phatthalung. It is located 859.253 km (533.9 mi) from Thon Buri Railway Station
The Trang River is one of main rivers of Trang Province apart from Palian River.