The Thai highway network follows the left-hand traffic rule of the road. The network is the twin responsibility of the Department of Highways, and the Department of Rural Roads, under the oversight of
Sign on Route 12 in the north of the country
Bridge construction on route 108
Route 12/Asian Highway 16 in Phetchabun Province being widened (2013)
Phet Kasem Road or Highway 4 is one of the four primary highways in Thailand, along with Phahonyothin Road, Mittraphap Road, and Sukhumvit Road. At 1,310.554 km, route 4 is the longest highway in Thai
Thai highway network
…regions: Highway Name Direction Phahonyothin Road to northern Thailand Mittraphap Road to northeastern Thailand Sukhumvit Road to eastern Thailand Phetkasem Road to southern Thailand The Highway number system specifies the use of 4 digits to refer to highways. By dividing highways into 4 sub-levels as follows…
Bang Khae MRT station and Phet Kasem Road (outbound)