info sign
Asian Highway route marker
Thai road sign น.20 — Asian Highway route marker. Meaning: Identifies an Asian Highway route number; the displayed AH number is an example. Learner-manual coverage: this identity is shown in the current DLT car-driver learner manual. Inclusion does not mean it appears in every theory test.
Thai name: ป้ายหมายเลขทางหลวงเอเชีย/อาเซียน
Independent English reference · Source: Department of Highways · Sign น.20
Road response
On the road
Driver action
What should you do?
Match the displayed Asian Highway number with your planned international route and follow the corresponding direction signs.
Exam-style scenario
Read the situation
An AH route marker confirms that your journey remains on the signed international corridor.
Best response: Use the matching AH number to confirm the international corridor and continue following its route markers.
Sign comparison
Don’t confuse it
This sign
Asian Highway route marker
Compare with
National highway route marker
Key difference
The AH prefix identifies an Asian Highway international corridor; the national-highway marker uses Thailand's domestic route number and shield.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
