Petchkasem_Road
Phet Kasem Road
Road in Thailand
Phet Kasem Road (Thai: ถนนเพชรเกษม, RTGS: Thanon Phet Kasem, pronounced [tʰā.nǒn pʰét kā.sěːm])[1] or Highway 4 (Thai: ทางหลวงแผ่นดินหมายเลข 4, AH2) is one of the four primary highways in Thailand, along with Phahonyothin Road (Highway 1), Mittraphap Road (Highway 2), and Sukhumvit Road (Highway 3). At 1,274 km, route 4 is the longest highway in Thailand.
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