Highway 304 (Thailand)

Highway 304 is a national highway of Thailand, leading from the Bangkok suburb city of Pak Kret to Nakhon Ratchasima in the country's Northeast. It forms the main link between the eastern and northeastern regions, and is one of the major alternative routes into the Northeast (the main route from Bangkok being Mittraphap Road, Highway 2).[1]

National Highway 304
ทางหลวงแผ่นดินหมายเลข 304
Ram Inthra Road in Bangkok's Bang Khen District
Route information
Length296.7 km (184.4 mi)
Major junctions
From Hwy 306 at Pak Kret
To Hwy 2 at Nakhon Ratchasima
Highway system
Highways in Thailand

The highway is known by several names along its route. Chaeng Watthana Road (Thai: ถนนแจ้งวัฒนะ) begins at Pak Kret in Nonthaburi Province, and leads eastward (and slightly south) to Lak Si Monument in Bangkok's Bang Khen District, where it crosses Phahon Yothin Road and from there becomes known as Ram Inthra Road (ถนนรามอินทรา, also spelled Ramindra) until it reaches Min Buri in Bangkok's eastern fringes. It then becomes known as Suwinthawong Road (ถนนสุวินทวงศ์) towards the town of Chachoengsao. From there, it continues mostly northeastward through the eastern province of the same name, past the town of Phanom Sarakham, then enters Prachin Buri Province where it crosses Highway 33 at Kabin Buri town. It then leads north, crossing the Sankamphaeng Mountains through a pass between Khao Yai and Thap Lan national parks into Nakhon Ratchasima Province. There, it passes through Wang Nam Khio and Pak Thong Chai districts before joining Mittraphap Road as it enters the city of Nakhon Ratchasima. Part of the highway is designated as Asian Highway 19.

The road was constructed in segments. The Chaeng Watthana and Suwinthawong sections were named in 1950,[2] while the section from Chachoengsao to Nakhon Ratchasima (originally designated Highway 23) was built from 1941, and was initially unpaved.[3] The Kabin Buri–Nakhon Ratchasima section was built and paved from 1965 to 1968 with assistance from the United States Army to support the USAF bases in Thailand during the Vietnam War.[4] The road, which cuts through the Dong Phayayen–Khao Yai Forest Complex World Heritage Site, underwent expansion into a four-lane highway from 2015 to 2018, which included the construction of bridges and underpasses to serve as wildlife corridors, the first in Thailand.[5]

References
  1. "ถนนสายหลัก-ทางเลี่ยงมุ่งหน้าภาคอีสาน รถเริ่มแน่น". Thai PBS (in Thai). 27 December 2019. Retrieved 19 August 2020.
  2. "ประกาศสำนักนายกรัฐมนตรี เรื่อง ตั้งชื่อทางหลวงแผ่นดินและสะพานขนาดใหญ่" (PDF). Royal Thai Government Gazette (in Thai). 67 (67): 6377–6389. 12 December 1950. Retrieved 19 August 2020.
  3. "โครงการก่อสร้างเชื่อมผืนป่ามรดกโลก และการขยายทางหลวงแผ่นดินหมายเลข 304". Highways Journal. 53 (2): 54–61. Apr–Jun 2016. ISSN 0125-4588. Retrieved 19 August 2020.
  4. "อนุสรณ์ ๒ ชาติ ถนน ๓๐๔ 'โคราช-กบินทร์บุรี'". Korat Daily (in Thai) (1758). 22–25 August 2008.
  5. Wangkiat, Paritta (13 March 2016). "Highway to the danger list?". Bangkok Post. Retrieved 19 August 2020.
    Sanubboon, Manit (26 January 2018). "Wildlife travels an easier road". Bangkok Post. Retrieved 19 August 2020.
    Wipatayotin, Apinya (31 May 2019). "Fence to guide wildlife between Unesco parks". Bangkok Post. Retrieved 19 August 2020.
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