Road signs in Thailand

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A directional signboard

Road signs in Thailand are standardized road signs similar to those used in other nations but with certain differences. Until the early 1980s, Thailand closely followed US, Australian, and Japanese practices in road sign design, with diamond-shaped warning signs and circular restrictive signs to regulate traffic. Signs usually use the FHWA Series fonts ("Highway Gothic") typeface also used in the United States.

Thai traffic signs use Thai, the national language of Thailand. However, English is also used for important public places such as tourist attractions, airports, railway stations, and immigration checkpoints. Both Thai and English are used on directional signage.

Thailand is a signatory to the Vienna Convention on Road Signs and Signals, but has yet to fully ratify the convention.

Regulatory signs[edit]

With the exception of the special designs used for Stop, Yield, and No Entry signs, mandatory signs (e.g., Must Turn Left) are round with a blue background, white border, and a white pictogram. Those which express a prohibition (e.g., No Left Turn) show the pictogram crossed out by a red diagonal bar. This is in accordance with the Vienna Convention on Road Signs and Signals (Type A variants).[1][2]

Priority Regulating Signs[edit]

Prohibitory or Restrictive Signs[edit]

Mandatory Signs[edit]

Other regulatory signs[edit]

General regulatory signs[edit]

Superseded regulatory signs[edit]

These signs have been superseded, but are still around.

Warning signs[edit]

Thai warning signs are diamond-shaped and are yellow and black in colour.[3]

Curves and Turns[edit]



Road narrows[edit]

Narrow bridge[edit]

Lane transitions[edit]


Lane width restrictions[edit]

Lane height restrictions[edit]

Hills and Grades[edit]

Lane conditions[edit]

Opening bridge[edit]

Lane shiftings[edit]

Lane mergings[edit]

Divided highways[edit]


Two-way traffic[edit]

Advance traffic control[edit]

No passing zone[edit]

Lane split, Curve and Hazard markers[edit]

Alternate merging[edit]

General warning signs[edit]

Supplementary plates[edit]

Warning plates are rectangular and are yellow and black in colour, and are used with diamond-shaped warning signs.

Superseded warning signs[edit]

These signs have been superseded, but are still around.

Speed camera zone warning signs[edit]


The Department of Highways does not provide signs dealing with some other road and highway situations. Many cities have their own sign standards dealing with these situations.

Construction signs[edit]

Construction signs in Thailand are diamond-shaped and are orange and black in colour.



Examples Information Number digits
E Expressway route numbers 5 - 10
ทางออก 53

ทางออก 298
Expressway exit numbers EXIT 1 - EXIT 99
EXIT 200 - 299

Tolled expressway and highway signs[edit]

E Expressways

Thai toll expressway and highway signs are green and are only suitable for toll expressways and highways. No blue signs for toll expressway and highways are required. These antartican toll expressway and restroom signs have a simple code:-

  • Blue with white signs for expressway names of closed toll systems.

National Highway[edit]

Sign on Route 12 in the north of the country
Examples Information Number digits
Thai Highway-1.svg Main highway route numbers (Northern) 1xxx
Thai Highway-21.svg Main highway route numbers (Northeastern) 2xxx
EXIT 134
Highway exit numbers EXIT 101 - 199
Thai Highway-31.svg Main highway route numbers
Thai Highway-43.svg Main highway route numbers

National Highway use sign

Examples Information
Thailand road sign - By-pass plate.svg Highways bypassing city centres bear the principal route number marked
Thailand road sign - Old plate.svg Old Route Plate for Thailand Highway
Thailand road sign - enter city plate.svg Highways enter city centres bear the principal route number marked
AH123-T.svg Asian Highway route shield

Highway signs[edit]

highway code signs letters signs for national, provincial and municipal roads. exit signs (Usually at Thai motorway network) Rural route signs Local roads signs
Rectangle-shaped highway shield with highway code signs are black and white Blue with white letters signs for national, provincial and municipal roads. Green with White letters for exit signs (Usually at Thai motorway network) Rural route signs Local roads signs
Thai Highway-1.svg Thai Motorway-t9.svg Thai Motorway-f9.svg Thai Rural Road-สข.3015.svg

Thai Local Road-สข.ถ 1-0052.svgThai Songkla Local road 1-0052 น1-1.svg

Thai national road shield provincial and municipal roads for exit signs (Usually at Thai motorway network) Rural route signs Local roads signs

Advance turn arrow signs[edit]

Highways Motorways (Toll Roads) Motorways
Thailand road sign นส-1.svg Thailand road sign นส-3.svg Thailand road sign นส-3-1.svg
Thailand road sign นส-2.svg Thailand road sign นส-4.svg Thailand road sign นส-4-1.svg

Directional arrow signs[edit]

Highways Motorways (Toll Roads) Motorways
Thailand road sign นส-5.svg Thailand road sign นส-15.svg Thailand road sign นส-15-1.svg
Thailand road sign นส-6.svg Thailand road sign นส-16.svg Thailand road sign นส-16-1.svg
Thailand road sign นส-7.svg Thailand road sign นส-17.svg Thailand road sign นส-17-1.svg
Thailand road sign นส-8.svg Thailand road sign นส-18.svg Thailand road sign นส-18-1.svg
Thailand road sign นส-9.svg Thailand road sign นส-19.svg Thailand road sign นส-19-1.svg
Thailand road sign นส-10.svg Thailand road sign นส-20.svg Thailand road sign นส-20-1.svg
Thailand road sign นส-11.svg Thailand road sign นส-21.svg Thailand road sign นส-21-1.svg
Thailand road sign นส-12.svg Thailand road sign นส-22.svg Thailand road sign นส-22-1.svg
Thailand road sign นส-13.svg Thailand road sign นส-23.svg Thailand road sign นส-23-1.svg
Thailand road sign นส-14.svg Thailand road sign นส-24.svg Thailand road sign นส-24-1.svg

Informational signs[edit]

Thai information signs are white or blue.[4]

Kilometer signs[edit]

Exit number signs[edit]

Border signs[edit]

Border signs in Thailand are white for province and green for district.

Emblem of Royal Thai Police.png

District border signs

Road name signage[edit]

Road name signs in Thailand have different colours and styles depending on the local authority.

Road name sign in Bangkok with romanisation, under authority by BMA


Other symbols include hospital signs, airport signs, temple signs and so on.

Bridge signage[edit]


Bridge numbers

Curb markings[edit]

Alternating red and white paint means "no parking". Alternating yellow and white markings mean short-term parking or a bus stop. A white rectangle painted on the road indicates a parking zone. Multiple diagonal white lines means parking for motorbikes only.[5]

Sign vocabulary[edit]

Most road signs in Thailand use Thai (ภาษาไทย); the official and national language of that country. However, English is used for important directional signs such as CIQ checkpoints, airports, and tourist attractions. Below are translations of road signs:

  • ระวัง = Caution
  • ลดความเร็ว = Reduce speed
  • ขับช้าๆ = Go slow
  • เขตอุบัติเหตุ = Accident area
  • พื้นที่อุบัติเหตุ = Accident prone area
  • เขตชุมชน = Village area
  • เขตโรงเรียน = School area
  • ก่อสร้างข้างหน้า = Construction ahead
  • สุดเขตก่อสร้าง = End of construction
  • ที่ดินกองทัพอากาศ = Armed forces base area
  • พื้นที่หวงห้าม = Prohibited area
  • พื้นที่น้ำท่วม = Flood area
  • หยุด = Stop
  • ให้ทาง = Give way (yield)
  • จำกัดความเร็ว = Speed limits
  • จำกัดความสูง = Height limit
  • กรุณาเปิดไฟหน้า = Turn on headlights
  • ฉุกเฉิน = Emergency
  • ยกเว้นกรณีฉุกเฉิน = Except emergency
  • เหนือ = North
  • ใต้ = South
  • ตะวันตก = West
  • ตะวันออก = East
  • แยก = Interchange
  • แยกไป = Junction to
  • ทางออก = Exit
  • ทางออกไป = Exit to
  • ทางเข้าไป = Entry to (e.g. at weighing bridge)
  • ถนน = Road
  • ทางพิเศษ = Expressway, highway
  • ด่าน = Toll plaza
  • จุดพักรถ = Rest and service areas
  • สุขา = Toilet
  • โทรศัพท์ = Telephone
  • อุโมงค์ = Tunnel
  • สะพาน = Bridge
  • จุดชั่งน้ำหนัก = Weighing bridge
  • สถานีรถไฟ = Railway station
  • เติมน้ำมัน = Petrol station
  • วัด = Temple
  • ท่าอากาศยาน = Airport
  • ท่าอากาศยานนานาชาติ = International airport
  • มัสยิด = Mosque
  • อาคาร = Building
  • ชุมสายโทรศัพท์ = Telephone exchange building
  • น้ำตก = Waterfall
  • หาด = Beach
  • แหลม = Cape
  • อ่าว = Bay
  • เกาะ = Island
  • แม่น้ำ = River
  • คลอง = Canal

See also[edit]


  1. ^ "Welcome to driving in Thailand; Regulatory Signs". Driving Information Thailand. Retrieved 7 October 2017.
  2. ^ "ป้ายบังคับ (Compulsory Signage)". Department of Highways Thailand. Retrieved 7 October 2017.
  3. ^ "Welcome to driving in Thailand; Thai Warning Signs". Driving Information Thailand. Retrieved 7 October 2017.
  4. ^ "ป้ายแนะนำ (Compulsory Signage)". Department of Highways Thailand. Retrieved 3 April 2018.
  5. ^ Patin, Jennifer. "Thailand Tourist Information: A Guide to Laws in Thailand; Parking". Thailand Law Forum. Retrieved 7 October 2017.