English: Road sign of the Asian highway 2 near Ratchaburi, Thailand.
The sign is located at Mueang Ratchaburi district at the Khao Ngu intersection, where Thai highway 3087 towards Tham Chompon split off from Thai highway 4 towards Bangkok. Asian highway 2 and Thai highway 4 are identical on the way to southern Thailand.
Actually, it is the Thai highway 4 bypass of Ratchaburi, as the original highway 4 passes through the city. The Thai text below the "4" says Thanon Phetkasem (ถนนเพชรเกษม), which is the name of Thai highway 4.