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Highway 403 (Thailand)

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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 Details

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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.

List of Intersection

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