National Highway 3 |
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| [[File:|290px|alt=Map showing the Sukhumvit road system in red.]] |
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| Part of AH123 (Rayong to Border to Cambodia) |
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| Length | 488.387 km (303.470 mi) |
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| Existed | 1936–present |
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| West end | Phloen Chit Road in Pathum Wan, Bangkok |
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| Major intersections | / in Bang Na, Bangkok
in Mueang Samut Prakan, Samut Prakan
/ in Bang Pakong, Chachoengsao
/ in Mueang Chonburi, Chonburi
in Mueang Chonburi, Chonburi
in Mueang Chonburi, Chonburi
in Mueang Chonburi, Chonburi
// in Si Racha, Chonburi
in Bang Lamung, Chonburi
in Pattaya, Bang Lamung, Chonburi
in Sattahip, Chonburi
in Sattahip, Chonburi
/ in Sattahip, Chonburi
in Ban Chang, Rayong
in Ban Chang, Rayong
in Mueang Rayong, Rayong
in Mueang Rayong, Rayong
in Mueang Rayong, Rayong
in Klaeng, Rayong
/ in Mueang Chanthaburi, Chanthaburi
in Mueang Chanthaburi, Chanthaburi |
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| Southeast end | NH48
AH123 in Khlong Yai District, Trat,
border to Cambodia |
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| Country | Thailand |
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| Provinces | Bangkok, Samut Prakan, Chachoengsao, Chonburi, Rayong, Chanthaburi, Trat |
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Sukhumvit Road (Thai: ถนนสุขุมวิท, RTGS: Thanon Sukhumwit, pronounced [tʰā.nǒn sùʔ.kʰǔm.wít]), or Highway 3 (Thai: ทางหลวงแผ่นดินหมายเลข 3), is a major road in Thailand, and a major surface road of Bangkok and other cities. It follows a coastal route from Bangkok to Khlong Yai District, Trat border to Koh Kong, Cambodia. It is one of the four major highways of Thailand, along with Phahonyothin Road (Highway 1), Mittraphap Road (Highway 2) and Phetkasem Road (Highway 4).
Sukhumvit Road is named after the fifth chief of the Department of Highways, Phra Bisal Sukhumvit. The road was opened in 1936.