Highway 42 (Thailand)

Route 42 (ทางหลวงแผ่นดินหมายเลข 42) as known Khlong Ngae - Su-ngai Kolok Highway or Phetkasem Road of Pattani-Narathiwat in time when traveling from Pattani to Narathiwat. or Korean Road or Batah Koli in northeastern Malay language is a southeastern highway that connects Songkhla Province, Pattani Province and Narathiwat Province. There is a distance throughout the line of 263.779 kilometers.

History
Before highway numbers were assigned The road in the Pattani-Narathiwat section is called Pattani–Narathiwat Highway Later it was named Ramkomut Road on December 10 1950, when Field Marshal P. Pibulsongkram was Prime Minister. In honor of Luang Parinya Yokhawibun (Chom-Ubon Ramkomut), the master technician who supervised the construction

In the past, Highway 42 usually routed from Ban Khlong Ngae, Sadao District, Songkhla Province to Ban Don Yang, Nong Chik District , Pattani Province. It is the main route for traveling between Songkhla Province and Pattani Province. But when there is construction of Highway 43 has increased, causing vehicles traveling to use this route instead. Because it helps to reduce time and distance better. It is also a 4-lane highway, while Highway 42, Khlong Ngae - Don Yang section. It is a 2 lane highway.

Highway 42 used to end in the city of Narathiwat. The distance at that time was approximately 198 kilometers (123 miles). Later, Highway 4084 and Highway 4057 were included as part of this highway as well. To connect to the border crossing point at Su-ngai Kolok.