Ratchaburi in the context of "Dvaravati"

The Tenasserim Hills or Tenasserim Range (Burmese: တနင်္သာရီ တောင်တန်း, [tənɪ̀ɰ̃θàjì tàʊɰ̃dáɰ̃]; Thai: ทิวเขาตะนาวศรี, RTGS: Thio Khao Tanao Si, pronounced [tʰīw kʰǎw tā.nāːw sǐː]; Malay: Banjaran Tanah Seri/Banjaran Tenang Sari) is the geographical name of a roughly 1,700 km long mountain chain, part of the Indo-Malayan mountain system in Southeast Asia.

Despite their relatively scant altitude these mountains form an effective barrier between Thailand and Myanmar in their northern and central region. There are only two main transnational roads and cross-border points between Kanchanaburi and Tak, at the Three Pagodas Pass and at Mae Sot. The latter is located beyond the northern end of the range, where the Tenasserim Hills meet the Dawna Range. Minor cross-border points are Sing Khon, near Prachuap Khiri Khan, as well as Bong Ti and Phu Nam Ron west of Kanchanaburi. The latter is expected to gain in importance if the planned Dawei Port Project goes ahead, along with a highway and a railway line between Bangkok and that harbor.

The Asian Highway Network (AH), also known as the Great Asian Highway, is a cooperative project among countries in Asia and the United Nations Economic and Social Commission for Asia and the Pacific (ESCAP) to improve their connectivity via highway systems. It is one of the three pillars of the Asian Land Transport Infrastructure Development (ALTID) project, endorsed by the ESCAP commission at its 48th session in 1992, comprising Asian Highway, Trans-Asian Railway (TAR) and facilitation of land transport projects.

Agreements have been signed by 32 countries to allow the highway to cross the continent and also reach to Europe. Some of the countries taking part in the highway project are India (Act East policy), Sri Lanka, Pakistan, China, Iran, Japan, South Korea, Nepal and Bangladesh. Most of the funding comes from the larger, more advanced Asian nations such as China, South Korea and Singapore as well as international agencies such as the Asian Development Bank (ADB) and the Asian Infrastructure Investment Bank (AIIB).

The Lao Wiang (Thai: ลาวเวียง, pronounced [lāːw wīaŋ]), sometimes also referred to as Lao Wieng, are a Tai sub-ethnic group of the Isan region. Approximately 50,000 self-identified Lao Wiang live in villages throughout Thailand, especially in the provinces of Prachinburi, Udon Thani, Nakhon Pathom, Chai Nat, Lopburi, Saraburi, Nakhon Nayok, Suphan Buri, Ratchaburi, Phetchaburi, and Roi Et with a significant number residing in Bangkok.