Sukhumvit Road

National Highway 3 shield}}
National Highway 3
ทางหลวงแผ่นดินหมายเลข 3
ถนนสุขุมวิท
Thanon Sukhumwit
Route information
Part of AH123 (Rayong to Border to  Cambodia)
Length488.387 km (303.470 mi)
Existed1936–present
Major junctions
West endPhloen Chit Road Phloen Chit Road in Pathum Wan, Bangkok
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
AH123-T 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
Southeast end NH48
AH123 in Khlong Yai District, Trat,
border to  Cambodia
Location
CountryThailand
ProvincesBangkok, Samut Prakan, Chachoengsao, Chonburi, Rayong, Chanthaburi, Trat
Highway system
Street sign depicting the name of Sukhumvit Road (Thanon Sukhumvit) in Thai and Latin letters

Sukhumvit Road (Thai: ถนนสุขุมวิท, RTGSThanon 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.

Sukhumvit Road is named after the fifth chief of the Department of Highways, Phra Bisal Sukhumvit. 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).