An eight-sided red sign with the word STOP. A driver reaching it shall come to a complete stop at the stop line and may proceed only after stopping fully and yielding to any vehicle or pedestrian with priority. Section 22(2) of the Land Traffic Act treats it identically to a red light signal for the duty to stop.

Verified as Thai road sign บ.1 from Thai Department of Land Transport sign series on 2026-05-15.

An inverted (point-down) triangle with a red border and white centre. A driver reaching it shall slow down and give way to traffic on the road being entered. A complete stop is required only when necessary to yield safely; otherwise the driver may continue without stopping.

Verified as Thai road sign บ.2 from Thai Department of Land Transport sign series on 2026-05-15.

A driver shall give way to oncoming traffic at this point. Used on narrow road sections where two-way traffic cannot pass simultaneously, or where one direction has been assigned priority.

Verified as Thai road sign บ.3 from Thai Department of Land Transport sign series on 2026-05-15.

Overtaking another vehicle is prohibited on the road section where this sign is posted. Drivers must remain behind vehicles ahead until the restriction ends or an end-of-restrictions sign is posted.

Verified as Thai road sign บ.4 from Thai Department of Land Transport sign series on 2026-05-15.

A solid red disc with a horizontal white bar. Vehicles are prohibited from entering the road or section beyond this sign. Most often used at the wrong-way end of a one-way street.

Verified as Thai road sign บ.5 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not make a U-turn to the right at or beyond this sign. The restriction applies at the location where the sign is posted; watch for a separate sign indicating where the restriction ends. Foreigners should note that U-turn rules in Thailand are enforced at specific marked points, not across a whole road.

Verified as Thai road sign บ.6 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not make a U-turn to the left at this point. The prohibition applies at the location where the sign is posted. Foreign drivers should note that U-turn rules in Thailand are sign-specific, so a U-turn is only permitted where a sign or road marking explicitly allows it.

Verified as Thai road sign บ.7 from Thai Department of Land Transport sign series on 2026-05-15.

Turning left is prohibited at this intersection or for the road segment that follows. The driver must continue straight or take a permitted alternative direction.

Verified as Thai road sign บ.8 from Department of Rural Roads sign series on 2026-05-15.

Turning right is prohibited at this intersection or for the road segment that follows. The driver must continue straight or take a permitted alternative direction.

Verified as Thai road sign บ.9 from Department of Rural Roads sign series on 2026-05-15.

Drivers must not change lanes to the left where this sign is posted. Stay in the current lane until the restriction ends or another sign allows the lane change.

Verified as Thai road sign บ.10 from Department of Rural Roads sign series on 2026-05-15.

Drivers must not change lanes to the right where this sign is posted. Remain in your current lane until the restriction no longer applies. Foreign drivers should note that lane-change rules are enforced on both expressways and ordinary roads.

Verified as Thai road sign บ.11 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not turn right or make a U-turn at this location. Both manoeuvres are prohibited from the point where the sign is posted. Note that many foreigners overlook the U-turn restriction when focusing on the right-turn arrow.

Verified as Thai road sign บ.12 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not turn left or make a U-turn at this location. Both manoeuvres are prohibited from the point where the sign is posted.

Verified as Thai road sign บ.13 from Department of Rural Roads sign series on 2026-05-15.

Cars are prohibited from entering or travelling on the road ahead. Drivers of private cars must not pass this sign. Note that this restriction applies only to the road segment it covers and does not affect other vehicle types not shown on the sign.

Verified as Thai road sign บ.14 from Thai Department of Land Transport sign series on 2026-05-15.

Trucks are prohibited from entering or travelling on the road ahead. Drivers of trucks must not pass this sign and should seek an alternative route. Note that this restriction applies to the road segment that follows, not a single point.

Verified as Thai road sign บ.15 from Thai Department of Land Transport sign series on 2026-05-15.

Motorcycles are prohibited from entering or travelling on the road ahead. Drivers of motorcycles must not pass this sign and should seek an alternative route.

Verified as Thai road sign บ.16 from Thai Department of Land Transport sign series on 2026-05-15.

Vehicles towing a trailer or semi-trailer are prohibited from entering or travelling on the road ahead.

Verified as Thai road sign บ.17 from Department of Rural Roads sign series on 2026-05-15.

3-wheeled motor vehicles are prohibited from entering or travelling on the road ahead. Drivers of such vehicles must not pass this sign. Note that tuk-tuks and similar 3-wheeled motorised vehicles fall under this prohibition.

Verified as Thai road sign บ.18 from Thai Department of Land Transport sign series on 2026-05-15.

Tricycles are prohibited from entering or travelling on the road ahead. Drivers of tricycles must not proceed beyond this sign. Note that this restriction applies to the road section that follows, not a single point.

Verified as Thai road sign บ.19 from Thai Department of Land Transport sign series on 2026-05-15.

Bicycles are not permitted to enter or travel on the road ahead. Riders must find an alternative route. This sign is common near expressways and high-speed roads where bicycles are considered a hazard.

Verified as Thai road sign บ.20 from Thai Department of Land Transport sign series on 2026-05-15.

Carts are not permitted on the road ahead. Drivers must not bring any cart onto this section of road. Note that this prohibition applies for the full stretch until an end-of-restriction or cancellation sign is displayed.

Verified as Thai road sign บ.21 from Thai Department of Land Transport sign series on 2026-05-15.

Agricultural vehicles are not permitted on this road. Drivers of tractors, combine harvesters, and similar farm machinery must not proceed beyond this sign. This restriction applies until an end-of-restrictions sign is posted.

Verified as Thai road sign บ.22 from Thai Department of Land Transport sign series on 2026-05-15.

Animal-drawn carts are prohibited from entering or travelling on the road ahead.

Verified as Thai road sign บ.23 from Department of Rural Roads sign series on 2026-05-15.

Motor vehicles are not permitted to enter or travel on the road ahead. Drivers of all motorised vehicles must find an alternative route. This restriction applies until the road section ends or a cancelling sign is posted.

Verified as Thai road sign บ.24 from Thai Department of Land Transport sign series on 2026-05-15.

Tricycles, bicycles, and motorcycles are prohibited from entering or travelling on the road ahead.

Verified as Thai road sign บ.25 from Wikimedia Commons contributors on 2026-05-15.

Motorcycles and three-wheeled motor vehicles are prohibited from entering or travelling on the road ahead. Drivers of such vehicles must not pass this sign. Foreign riders should note that this restriction applies regardless of engine size or vehicle registration country.

Verified as Thai road sign บ.26 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not use the horn or make unnecessary noise in the area where this sign is posted.

Verified as Thai road sign บ.27 from Department of Rural Roads sign series on 2026-05-15.

Pedestrians are prohibited from entering or walking along this section of road. Drivers should be aware that this sign is directed at road users on foot, not at vehicle operators, but it serves as a reminder that no pedestrians should be present ahead.

Verified as Thai road sign บ.28 from Thai Department of Land Transport sign series on 2026-05-15.

You must not park your vehicle in the area where this sign applies. Move on without stopping to leave passengers or goods for an extended period. Foreigners should note that even a brief unattended stop may be treated as parking under Thai traffic rules.

Verified as Thai road sign บ.29 from Thai Department of Land Transport sign series on 2026-05-15.

The driver must not stop the vehicle at any point along the road section marked by this sign. The prohibition applies in both directions on the marked stretch unless a sign explicitly ends it. Foreign drivers should note that stopping briefly — even to drop off a passenger — is not permitted here.

Verified as Thai road sign บ.30 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must stop at the checkpoint or inspection point indicated by this sign and proceed only when allowed.

Verified as Thai road sign บ.31 from Department of Rural Roads sign series on 2026-05-15.

Drivers must not exceed 10 km/h on the road section ahead. This limit remains in force until an end-of-restriction sign or a new speed-limit sign is displayed. Note that 10 km/h zones are common in car parks, ferry terminals, and other slow-traffic areas.

Verified as Thai road sign บ.32-10 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 20 km/h from this sign onward. The limit remains in force until an end-of-restriction sign or a different speed limit sign is posted. Typically used in school zones, dense pedestrian areas, or near construction.

Verified as Thai road sign บ.32-20 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 30 km/h from this sign until the restriction ends. This limit commonly appears in school zones, residential areas, and other locations where low speeds are required. Note that speed limits in Thailand are enforced in km/h, not mph.

Verified as Thai road sign บ.32-30 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 40 km/h from this sign onward. The limit remains in force until an end-of-restrictions sign or a new speed-limit sign is displayed. Note that speed limits in Thailand are enforced in both urban and rural areas, so watch for this sign whenever road conditions change.

Verified as Thai road sign บ.32-40 from Thai Department of Land Transport sign series on 2026-05-15.

You must not drive faster than 45 km/h from this sign onward. The limit applies until an end-of-restriction sign or a new speed limit sign is shown. Note that speed limits in Thailand are often lower than foreigners expect on roads that appear to allow higher speeds.

Verified as Thai road sign บ.32-45 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 50 km/h from this sign onward. The limit remains in force until an end-of-restriction sign or a different speed limit sign is posted. Foreign drivers should note that speed limit signs in Thailand apply to all vehicle types unless a separate sign states otherwise.

Verified as Thai road sign บ.32-50 from Thai Department of Land Transport sign series on 2026-05-15.

You must not drive faster than 60 km/h beyond this sign. The limit applies until an end-of-restriction sign or a new speed limit sign is shown. Note that speed limits in Thailand are enforced from the sign onward and may change frequently in urban areas.

Verified as Thai road sign บ.32-60 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 70 km/h from this sign onward. The limit remains in force until an end-of-restrictions sign or a new speed limit sign is displayed. Foreign drivers should note that speed limits in Thailand are enforced by camera as well as police checkpoint.

Verified as Thai road sign บ.32-70 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 80 km/h from this sign onward. The limit remains in force until an end-of-restrictions sign or a new speed limit sign is displayed. Note that many Thai roads post lower limits in towns or near schools, so watch for subsequent signs.

Verified as Thai road sign บ.32-80 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 90 km/h from this sign onward. The limit applies until a different speed limit sign or an end-of-restrictions sign is posted. Note that Thailand drives on the left and speed limits are strictly enforced on expressways and highways.

Verified as Thai road sign บ.32-90 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 100 km/h on the road section ahead. The limit applies until a new speed limit sign or an end-of-restrictions sign cancels it. Note that Thailand enforces speed limits by camera as well as by police checkpoint, so compliance is important even on quiet roads.

Verified as Thai road sign บ.32-100 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 110 km/h on the road section ahead. The limit applies until a new speed limit sign or end-of-restrictions sign is displayed. Foreign drivers should note that this is one of the higher limits found on Thai expressways and motorways.

Verified as Thai road sign บ.32-110 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not exceed 120 km/h on the road section ahead. The limit applies until an end-of-restriction sign or a new speed limit sign is displayed. Foreign drivers should note that this is among the highest posted limits in Thailand and is typically found only on expressways or motorways.

Verified as Thai road sign บ.32-120 from Thai Department of Land Transport sign series on 2026-05-15.

Vehicles with a total weight exceeding 25 tonnes are prohibited from passing this point. Typically used to protect bridges, weight-sensitive road segments, and weak embankments.

Verified as Thai road sign บ.33 (25 ตัน) from Department of Rural Roads sign series on 2026-05-15.

Vehicles whose total weight exceeds 10 tonnes must not proceed beyond this sign. This restriction applies to the road segment ahead until it is lifted by an end-of-restrictions sign. Foreign drivers should note that gross vehicle weight — not load weight alone — is what counts.

Verified as Thai road sign บ.33 from Thai Department of Land Transport sign series on 2026-05-15.

Vehicles wider than 2.5 metres must not pass beyond this sign. Drivers of wide loads — including trucks with mirrors or side cargo — should find an alternative route before reaching this point.

Verified as Thai road sign บ.34 from Thai Department of Land Transport sign series on 2026-05-15.

Vehicles exceeding 2.5 metres in height must not pass beyond this sign. This restriction commonly applies at underpasses, bridges, and car parks where overhead clearance is limited. Foreign drivers should note that vehicle height includes any roof-mounted luggage, equipment, or cargo.

Verified as Thai road sign บ.35 from Thai Department of Land Transport sign series on 2026-05-15.

Vehicles whose total length exceeds 10 metres must not proceed beyond this sign. This restriction commonly affects long trucks, buses, and vehicles towing trailers — measure the full coupled length before entering.

Verified as Thai road sign บ.36 from Thai Department of Land Transport sign series on 2026-05-15.

All restrictions imposed by previous prohibition signs (speed, weight, no-overtaking, etc.) on this road segment end at this point. The default Highway Code limits resume.

Verified as Thai road sign บ.55 from Department of Rural Roads sign series on 2026-05-15.

Traffic on the road ahead must travel straight in the direction shown by the arrow. Drivers must not drive against the one-way direction.

Verified as Thai road sign บ.37 from Thai Department of Land Transport sign series on 2026-05-15.

Traffic on the road ahead must travel to the left in the direction shown by the arrow. Drivers must not enter or continue against that one-way direction.

Verified as Thai road sign บ.38 from Thai Department of Land Transport sign series on 2026-05-15.

Traffic on the road ahead must travel to the right in the direction shown by the arrow. Drivers must not enter or continue against that one-way direction.

Verified as Thai road sign บ.39 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must pass to the left of the sign or obstruction.

Verified as Thai road sign บ.40 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must pass to the right of the sign or obstruction.

Verified as Thai road sign บ.41 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers may pass either to the left or to the right of the sign or obstruction where both paths rejoin the same route.

Verified as Thai road sign บ.42 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must turn left at the junction ahead and must not go straight or turn right.

Verified as Thai road sign บ.43 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must turn right at the junction ahead and must not go straight or turn left.

Verified as Thai road sign บ.44 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must turn left or right at the junction ahead and must not continue straight.

Verified as Thai road sign บ.45 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must continue straight or turn left at the junction ahead and must not turn right.

Verified as Thai road sign บ.46 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must continue straight or turn right at the junction ahead and must not turn left.

Verified as Thai road sign บ.47 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers entering the roundabout must circulate to the left and yield to traffic already moving around the roundabout.

Verified as Thai road sign บ.48 from Thai Department of Land Transport sign series on 2026-05-15.

The marked lane is reserved for buses where the bus-lane control applies.

Verified as Thai road sign บ.49 from Thai Department of Land Transport sign series on 2026-05-15.

The marked lane is reserved for vehicles carrying at least the number of occupants shown on the sign.

Verified as Thai road sign บ.50 from Thai Department of Land Transport sign series on 2026-05-15.

The marked lane is reserved for motorcycles where the motorcycle-lane control applies.

Verified as Thai road sign บ.51 from Thai Department of Land Transport sign series on 2026-05-15.

The marked lane or path is reserved for bicycles where the bicycle-lane control applies.

Verified as Thai road sign บ.52 from Thai Department of Land Transport sign series on 2026-05-15.

The path or area is reserved for pedestrians. Other road users must not use it unless an exception applies.

Verified as Thai road sign บ.53 from Thai Department of Land Transport sign series on 2026-05-15.

Drivers must not travel below 30 km/h where this minimum-speed control applies, unless traffic or safety conditions require otherwise.

Verified as Thai road sign บ.54-30 from Thai Department of Land Transport sign series on 2026-05-15.

The road ahead curves to the left. Reduce speed and keep control before entering the curve.

Verified as Thai road sign ต.1 from Department of Rural Roads sign series on 2026-05-15.

This sign warns the driver that a curve is approaching. Reduce speed before reaching the curve and keep the vehicle under control throughout. Driving too fast into a curve is a common cause of accidents on Thai roads.

Verified as Thai road sign ต.2 from Thai Department of Land Transport sign series on 2026-05-15.

The road ahead has a sharp curve to the left. Slow down more than for an ordinary curve and prepare to steer carefully.

Verified as Thai road sign ต.3 from Department of Rural Roads sign series on 2026-05-15.

This sign warns that a sharp curve lies ahead. Reduce speed before entering the curve and keep to your lane throughout. Entering a sharp curve too fast is a common cause of loss of control, particularly on unfamiliar roads.

Verified as Thai road sign ต.4 from Thai Department of Land Transport sign series on 2026-05-15.

The road ahead bends in two successive curves in opposite directions. Reduce your speed before entering and stay in your lane through both bends. Riders unfamiliar with Thai mountain or rural roads should be especially cautious, as the second curve may be sharper than expected.

Verified as Thai road sign ต.5 from Thai Department of Land Transport sign series on 2026-05-15.

The road ahead curves in one direction and then the other, beginning with a curve to the right. Reduce speed before the first curve.

Verified as Thai road sign ต.6 from Department of Rural Roads sign series on 2026-05-15.

The road ahead bends sharply in one direction and then immediately bends sharply in the opposite direction. Reduce speed before the curves and stay in your lane throughout. Foreigners should note that reverse curves can appear sooner than expected on Thai roads.

Verified as Thai road sign ต.7 from Thai Department of Land Transport sign series on 2026-05-15.

The road ahead has sharp reverse curves, beginning with a sharp curve to the right. Slow down early and keep to the lane.

Verified as Thai road sign ต.8 from Department of Rural Roads sign series on 2026-05-15.

The road ahead winds through several curves, beginning to the left. Reduce speed and stay alert for repeated changes of direction.

Verified as Thai road sign ต.9 from Department of Rural Roads sign series on 2026-05-15.

This sign warns that the road ahead has a series of curves or bends. Reduce speed and keep full control of the vehicle before entering the winding section. Foreign drivers should take extra care, as road surfaces on curves in Thailand may be slippery when wet.

Verified as Thai road sign ต.10 from Thai Department of Land Transport sign series on 2026-05-15.

An uncontrolled crossroads junction lies ahead. The driver should reduce speed and be prepared to apply the §71(2) yield-to-LEFT rule if no traffic signs or signals are in place at the junction itself.

Verified as Thai road sign ต.11 from Department of Rural Roads sign series on 2026-05-15.

A Y-shaped junction is ahead. Reduce speed and be prepared to give way or merge, as the road splits or joins at an angle. Foreign drivers should watch carefully, as the correct lane to take may not be immediately obvious.

Verified as Thai road sign ต.12 from Thai Department of Land Transport sign series on 2026-05-15.

A side road joins from the left ahead. Slow down and be alert for vehicles entering or leaving the main road.

Verified as Thai road sign ต.13 from Department of Rural Roads sign series on 2026-05-15.

This sign warns that a side road joins the road ahead. Drivers should reduce speed and watch for vehicles entering or crossing from the side road.

Verified as Thai road sign ต.14 from Thai Department of Land Transport sign series on 2026-05-15.

Two side roads meet the main road at nearby but offset points ahead. Slow down and watch for traffic entering from both sides.

Verified as Thai road sign ต.15 from Department of Rural Roads sign series on 2026-05-15.

A staggered crossroads is approaching. Reduce speed and be prepared to give way to crossing traffic, as the intersecting roads do not meet at the same point. Drivers unfamiliar with staggered layouts should take extra care, as the second junction may appear sooner than expected.

Verified as Thai road sign ต.16 from Thai Department of Land Transport sign series on 2026-05-15.

A side road joins the main road from the left at an angle ahead. Slow down and watch for turning or merging traffic.

Verified as Thai road sign ต.17 from Department of Rural Roads sign series on 2026-05-15.

A side road joins the main road ahead at an angle. Reduce speed and be prepared for vehicles entering from the side. This junction type is common in rural Thailand and may be easy to miss.

Verified as Thai road sign ต.18 from Thai Department of Land Transport sign series on 2026-05-15.

A side road joins from the left at a different angle ahead. Slow down and be ready for vehicles entering the main road.

Verified as Thai road sign ต.19 from Department of Rural Roads sign series on 2026-05-15.

A side road joins from the right at an angle ahead. Slow down and be ready for vehicles entering the main road.

Verified as Thai road sign ต.20 from Department of Rural Roads sign series on 2026-05-15.

A roundabout lies ahead. Reduce speed and prepare to follow roundabout priority and lane discipline.

Verified as Thai road sign ต.21 from Department of Rural Roads sign series on 2026-05-15.

The road ahead becomes narrower from both sides. Reduce speed and be prepared to adjust your road position as the usable width of the carriageway decreases. Take extra care when meeting oncoming vehicles or overtaking.

Verified as Thai road sign ต.22 from Thai Department of Land Transport sign series on 2026-05-15.

The roadway narrows from the left side ahead. Reduce speed and keep clear of traffic affected by the narrowing lane edge.

Verified as Thai road sign ต.23 from Department of Rural Roads sign series on 2026-05-15.

The road ahead becomes narrower on the right side. Reduce speed and be prepared to adjust your position toward the left side of the lane. Foreign drivers should note that oncoming traffic may be closer than expected through the narrowed section.

Verified as Thai road sign ต.24 from Thai Department of Land Transport sign series on 2026-05-15.

A narrow bridge lies ahead. Reduce speed and be prepared for limited lane width or opposing traffic.

Verified as Thai road sign ต.25 from Department of Rural Roads sign series on 2026-05-15.

The left lane is ending ahead; drivers in that lane must merge safely into the lane to the right. Be prepared for traffic slowing or shifting as the lane narrows.

Verified as Thai road sign ต.26 from Thai Department of Land Transport sign series on 2026-05-15.

The right lane ends ahead. Drivers in that lane should merge safely before the lane closes.

Verified as Thai road sign ต.27 from Department of Rural Roads sign series on 2026-05-15.

A level railway crossing without a barrier is ahead. Drivers must slow down, look and listen for trains, and be prepared to stop before crossing.

Verified as Thai road sign ต.28 from Thai Department of Land Transport sign series on 2026-05-15.

A level railway crossing with a barrier or gate is ahead. Drivers must slow down and stop when the barrier, signal, or railway official indicates that a train is approaching.

Verified as Thai road sign ต.29 from Thai Department of Land Transport sign series on 2026-05-15.

A railway crossing is located on or near the side road ahead. Slow down and watch for rail-crossing controls and turning traffic.

Verified as Thai road sign ต.30 from Department of Rural Roads sign series on 2026-05-15.

A width restriction of 2.5 metres is ahead. Vehicles wider than 2.5 metres must not proceed through the restricted section. Foreign drivers should note that vehicle width includes mirrors and any load extending beyond the body.

Verified as Thai road sign ต.31 from Thai Department of Land Transport sign series on 2026-05-15.

A structure ahead has a maximum clearance of 2.5 metres. Drivers of tall vehicles must not proceed unless their vehicle's height is below this limit. Note that vehicle height includes any load carried on the roof.

Verified as Thai road sign ต.32 from Thai Department of Land Transport sign series on 2026-05-15.

This sign warns that a steep uphill gradient is ahead. Reduce speed and select an appropriate gear before reaching the incline, especially if driving a heavy or underpowered vehicle.

Verified as Thai road sign ต.33 from Thai Department of Land Transport sign series on 2026-05-15.

A steep downhill section lies ahead. Reduce speed before the descent begins and use a lower gear to maintain control; relying on brakes alone on a long slope can cause them to overheat.

Verified as Thai road sign ต.34 from Thai Department of Land Transport sign series on 2026-05-15.

A speed hump or raised road section is ahead. Drivers should slow down before reaching it and keep both hands steady on the steering wheel, especially on motorcycles.

Verified as Thai road sign ต.35 from Department of Rural Roads sign series on 2026-05-15.

The road surface ahead is uneven or rough. Drivers should reduce speed, keep a firm grip on the steering wheel, and watch for sudden changes in road level.

Verified as Thai road sign ต.36 from Department of Rural Roads sign series on 2026-05-15.

A dip in the road surface lies ahead. Reduce speed before reaching it to maintain control of the vehicle. Dips can be sharper than they appear, so exercise caution even on roads that look flat.

Verified as Thai road sign ต.37 from Thai Department of Land Transport sign series on 2026-05-15.

The road surface ahead may be slippery, often due to weather, oil, or a surface change. The driver should reduce speed and avoid sudden braking, accelerating, or steering inputs.

Verified as Thai road sign ต.38 from Department of Rural Roads sign series on 2026-05-15.

The road surface ahead has loose material such as gravel or stones. Reduce your speed and maintain firm control of the steering. Foreigners should note that loose surfaces can cause skidding more easily than in cooler climates.

Verified as Thai road sign ต.39 from Thai Department of Land Transport sign series on 2026-05-15.

This sign warns that rocks may fall onto the road ahead. Reduce speed and be prepared to stop or avoid debris. Foreign drivers should note that such hazards can appear suddenly on mountain roads.

Verified as Thai road sign ต.40 from Thai Department of Land Transport sign series on 2026-05-15.

An opening or movable bridge lies ahead. Slow down and be ready to stop if the bridge is open or controlled.

Verified as Thai road sign ต.41 from Department of Rural Roads sign series on 2026-05-15.

The driving lane shifts to the left ahead, often where the road realigns around an obstacle, bridge, or construction zone. Reduce speed, follow lane markings carefully, and keep your vehicle within the shifted lane path.

Verified as Thai road sign ต.42 from Thai Department of Land Transport sign series on 2026-05-15.

The driving lane shifts to the right ahead, often where the road realigns around an obstacle, bridge, or construction zone. Reduce speed, follow lane markings carefully, and keep your vehicle within the shifted lane path.

Verified as Thai road sign ต.43 from Thai Department of Land Transport sign series on 2026-05-15.

An extra lane is being added to the road ahead. Drivers should be prepared for merging traffic or a change in lane configuration. Foreign drivers should note that the new lane may join from either side.

Verified as Thai road sign ต.44 from Thai Department of Land Transport sign series on 2026-05-15.

A traffic lane joins from the right ahead. Stay alert for vehicles entering the main carriageway.

Verified as Thai road sign ต.45 from Department of Rural Roads sign series on 2026-05-15.

A side road joins your road from the left ahead. Be prepared for vehicles entering your lane from the left and watch for traffic that may merge without yielding. Adjust speed and position as needed.

Verified as Thai road sign ต.46 from Thai Department of Land Transport sign series on 2026-05-15.

A side road joins your road from the right ahead. Be prepared for vehicles entering your lane from the right and watch for traffic that may merge without yielding. Adjust speed and position as needed.

Verified as Thai road sign ต.47 from Thai Department of Land Transport sign series on 2026-05-15.

The road ahead divides into two carriageways with a central divider. Drivers must keep to the left edge of their carriageway and stay within their marked lane until the road merges again.

Verified as Thai road sign ต.48 from Department of Rural Roads sign series on 2026-05-15.

The divided road or dual carriageway ahead is ending, and traffic will continue on an undivided road. Drivers should reduce speed, stay left, and watch for oncoming traffic after the divider ends.

Verified as Thai road sign ต.49 from Department of Rural Roads sign series on 2026-05-15.

A U-turn opening or U-turn point is ahead on the right. Drivers who need to turn around should prepare early, reduce speed, and move into the correct lane when safe.

Verified as Thai road sign ต.50 from Thai Department of Land Transport sign series on 2026-05-15.

A U-turn opening or U-turn point is ahead on the left. Drivers who need to turn around should prepare early, reduce speed, and move into the correct lane when safe.

Verified as Thai road sign ต.51 from Thai Department of Land Transport sign series on 2026-05-15.

The road ahead carries traffic in both directions. Keep left and be prepared for oncoming vehicles.

Verified as Thai road sign ต.52 from Department of Rural Roads sign series on 2026-05-15.

Traffic signals are installed ahead. Reduce speed and be prepared to stop at the signal.

Verified as Thai road sign ต.53 from Department of Rural Roads sign series on 2026-05-15.

A regulatory stop sign is ahead. The driver should reduce speed and prepare to come to a complete stop at the stop line at the next intersection.

Verified as Thai road sign ต.54 from Department of Rural Roads sign series on 2026-05-15.

A regulatory give-way (yield) sign is ahead. The driver should reduce speed and prepare to yield to traffic on the road being entered.

Verified as Thai road sign ต.55 from Department of Rural Roads sign series on 2026-05-15.

A marked pedestrian crossing is ahead. The driver should slow down and be prepared to yield to any pedestrian crossing or about to cross.

Verified as Thai road sign ต.56 from Department of Rural Roads sign series on 2026-05-15.

A school is ahead and children may be crossing or walking near the road. The driver should reduce speed and be prepared to stop, especially at the start and end of the school day.

Verified as Thai road sign ต.57 from Department of Rural Roads sign series on 2026-05-15.

This sign warns that animals may be crossing or moving along the road ahead. Drivers should slow down and be prepared to stop, as animals can appear suddenly and behave unpredictably.

Verified as Thai road sign ต.58 from Thai Department of Land Transport sign series on 2026-05-15.

This sign warns that aircraft fly at low altitude ahead, typically near an airport or flight path. Drivers must be prepared for sudden noise and movement overhead that may cause distraction; reduce speed and stay alert while passing through the area.

Verified as Thai road sign ต.59 from Thai Department of Land Transport sign series on 2026-05-15.

A non-specific hazardous condition lies ahead. The driver should reduce speed and remain alert for whatever the hazard turns out to be.

Verified as Thai road sign ต.60 from Department of Rural Roads sign series on 2026-05-15.

A no-overtaking zone begins ahead. Drivers should prepare to stop overtaking before the restriction starts and remain in lane through the marked zone.

Verified as Thai road sign ต.61 from Thai Department of Land Transport sign series on 2026-05-15.

The roadway splits around an obstruction or island ahead. Keep to the permitted side and adjust speed before the split.

Verified as Thai road sign ต.62 from Department of Rural Roads sign series on 2026-05-15.

A black-and-yellow chevron marker indicates a sharp change of alignment to the right. Follow the chevron direction and slow down.

Verified as Thai road sign ต.63 from Department of Rural Roads sign series on 2026-05-15.

A row of black-and-yellow chevrons marks a sharp change of road alignment to the right. Follow the chevron direction and reduce speed.

Verified as Thai road sign ต.64 from Department of Rural Roads sign series on 2026-05-15.

A large black-and-yellow arrow marker warns of a sharp change of direction to the right. Follow the arrow and reduce speed.

Verified as Thai road sign ต.65 from Department of Rural Roads sign series on 2026-05-15.

A black-and-yellow chevron marker indicates a sharp change of alignment to the left. Follow the chevron direction and slow down.

Verified as Thai road sign ต.66 from Department of Rural Roads sign series on 2026-05-15.

A row of black-and-yellow chevrons marks a sharp change of road alignment to the left. Follow the chevron direction and reduce speed.

Verified as Thai road sign ต.67 from Department of Rural Roads sign series on 2026-05-15.

A large black-and-yellow arrow marker warns of a sharp change of direction to the left. Follow the arrow and reduce speed.

Verified as Thai road sign ต.68 from Department of Rural Roads sign series on 2026-05-15.

A black-and-yellow chevron hazard marker highlights a road edge, curve, or obstruction that drivers must avoid.

Verified as Thai road sign ต.69 from Department of Rural Roads sign series on 2026-05-15.

A large black-and-yellow two-way arrow marker warns that traffic must pass to either side of a central obstruction or alignment change.

Verified as Thai road sign ต.70 from Department of Rural Roads sign series on 2026-05-15.

A hazard marker is posted at the side of the road or at a divergence point. Drivers must keep to the side of the road that the marker indicates and avoid crossing into the hazardous area.

Verified as Thai road sign ต.71 from Department of Rural Roads sign series on 2026-05-15.

A black-and-yellow obstruction marker identifies a roadside or carriageway obstruction. Keep clear of the marked hazard.

Verified as Thai road sign ต.72 from Department of Rural Roads sign series on 2026-05-15.

A black-and-yellow obstruction marker identifies a roadside or carriageway obstruction. Keep clear of the marked hazard.

Verified as Thai road sign ต.73 from Department of Rural Roads sign series on 2026-05-15.

Traffic streams merge alternately ahead. Adjust speed and merge in turn with vehicles from the adjacent lane.

Verified as Thai road sign ต.74 from Department of Rural Roads sign series on 2026-05-15.

A T-junction lies ahead, where the current road meets another road and through traffic may need to turn left or right. Reduce speed and prepare to yield or stop as required by signs, signals, or traffic on the intersecting road.

Verified as Thai road sign ต.75 from Department of Rural Roads sign series on 2026-05-15.

A city, town, or community area begins ahead. Drivers should reduce speed and watch for pedestrians, side traffic, parked vehicles, and local road activity.

Verified as Thai road sign ต.77 from Department of Rural Roads sign series on 2026-05-15.

A city, town, or community area begins ahead. Drivers should reduce speed and watch for pedestrians, side traffic, parked vehicles, and local road activity. This is the Thai-and-English text variant of the same warning.

Verified as Thai road sign ต.77-1 from Department of Rural Roads sign series on 2026-05-15.

Survey crews are working ahead. The driver should slow down and watch for survey personnel and equipment on or beside the road.

Verified as Thai road sign ตก.1 from Department of Rural Roads sign series on 2026-05-15.

Construction or maintenance work is ahead. The driver should slow down and be prepared to obey any temporary signs, signals, or flagger directions in the work zone.

Verified as Thai road sign ตค.1 from Department of Highways sign series on 2026-05-15.

Work is taking place on the road shoulder ahead. Drivers should slow down, keep clear of workers and equipment, and be prepared for narrowed usable road space.

Verified as Thai road sign ตค.12 from Department of Highways sign series on 2026-05-15.

Traffic must follow a temporary detour to the right through or around a road-work zone. Reduce speed and follow the indicated direction.

Verified as Thai road sign ตค.23 from Department of Highways sign series on 2026-05-15.

Traffic must follow a temporary detour to the left through or around a road-work zone. Reduce speed and follow the indicated direction.

Verified as Thai road sign ตค.24 from Department of Highways sign series on 2026-05-15.

The right lane is closed ahead in a road-work zone. Reduce speed and merge left before the closure.

Verified as Thai road sign ตค.เตือนปิดช่องจราจร from Department of Rural Roads sign series on 2026-05-15.

The road ahead is damaged. Drivers should slow down, watch for potholes or broken pavement, and pass through carefully.

Verified as Thai road sign ตค.ทางชำรุด from Department of Rural Roads sign series on 2026-05-15.

A hospital is located near this point on the road. Drivers should be aware that emergency vehicles may enter or exit the road from the hospital and yield when required.

Verified as Thai road sign น.7 from Thai Department of Land Transport sign series on 2026-05-15.

This guide sign panel identifies access between a frontage road and the main carriageway: entrance to the main road and exit to the frontage road.

Verified as Thai road sign น.10-1 from Department of Highways sign series on 2026-05-15.

A designated U-turn point is available here. Drivers who need to reverse direction should slow down, move into the correct lane when safe, and make the U-turn only when traffic is clear.

Verified as Thai road sign น.11 from Department of Rural Roads sign series on 2026-05-15.

An airport is signposted along this route. The sign helps drivers locate airport access from the highway.

Verified as Thai road sign Airport from Wikimedia Commons contributors on 2026-05-15.

Food or restaurant service is signposted along this route. Drivers should be aware that vehicles may enter or exit the road at the access point.

Verified as Thai road sign น.การให้บริการร้านอาหาร from Thai Department of Land Transport sign series on 2026-05-15.

A frontage road exit or access route is ahead. Drivers intending to use the frontage road should prepare early for the indicated exit.

Verified as Thai road sign Frontage Road Ahead from Department of Highways sign series on 2026-05-15.

A petrol station or fuel service is signposted along this route. Drivers should be aware that vehicles may enter or exit the road from the service access point.

Verified as Thai road sign น.สถานีบริการน้ำมัน from Thai Department of Land Transport sign series on 2026-05-15.