Sukhumvit Road

National Highway 3
ทางหลวงแผ่นดินหมายเลข 3
ถนนสุขุมวิท Thanon Sukhumwit
Route information
Part of AH123 (Rayong to Border to  Cambodia)
Length	488.387 km (303.470 mi)
Existed	1936–present
Major junctions
West end	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 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
Country	Thailand
Provinces	Bangkok, Samut Prakan, Chachoengsao, Chonburi, Rayong, Chanthaburi, Trat
Highway system
Highways in Thailand Motorways Asian Highways

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.

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).