Right of way, without doubts.
At an unsignalled junction in Thailand, the vehicle approaching from the left has priority when two cars arrive together; otherwise the vehicle already inside the intersection or already on the priority road goes first. Emergency vehicles using lights or sirens must be given a clear path, and drivers must yield to pedestrians on marked crossings.
Mascot at the mouth of a Thai T-junction holding up a single inverted yield-triangle sign, calmly signalling 'who goes first?'
Rule pattern
Already-in beats arriving.
The vehicle already on the priority road, already in the intersection, or already on the roundabout goes first. When two arrive together at an uncontrolled junction, the one on the left has priority. Emergency vehicles override everything.
Junctions, roundabouts, merges, emergency vehicles. The patterns Thai exam wording uses to decide who goes first, untangled.
Written by a farang who failed once — independent of the Thai Department of Land Transport. About FarangDrive.
Sample questions
Try 5 right of way questions
Try a choice and the answer reveals inline, or open the panel directly. Exam-style wording, with the explanation right below.
Right of way
You are approaching an unsignaled intersection where the car in front has stopped. The road ahead looks clear. What should you do?
Show answer & explanation
Correct answer
A · Wait behind the stopped car and do not attempt to overtake.
Overtaking is strictly prohibited at any unsignaled intersection, regardless of how clear the road appears. A stopped vehicle may be yielding to unseen cross traffic, making overtaking there extremely dangerous.
Right of way
At an intersection with no signs or traffic signals, Car A and Car B arrive at the same time. Car B is on Car A’s left. Who should go first?
Show answer & explanation
Correct answer
A · Car B, the vehicle on Car A’s left.
When vehicles arrive at an uncontrolled intersection at the same time, Thai traffic law gives priority to the vehicle on the driver’s left. Therefore, Car A should let Car B go first. This rule applies only when the roads are otherwise equal; if one road is a main road and the other is a secondary road, traffic on the main road has priority.
Right of way
You are approaching an intersection with a STOP sign and a stop line across your lane. What must you do?
Show answer & explanation
Correct answer
A · Stop completely at or before the stop line, give way to traffic and pedestrians on the crossing road, and proceed only when it is safe.
A STOP sign requires a full stop at or before the stop line. You must stop every time, check for vehicles and pedestrians on the crossing road, and proceed only when the way is clear and safe.
Right of way
A large truck ahead signals left and moves slightly to the right before turning into a narrow side road. What should you do?
Show answer & explanation
Correct answer
A · Stay back and give the truck enough space to complete its turn.
Large vehicles may need extra space before turning into a narrow road or entrance. You should stay back and allow the truck room to complete the turn. Passing on the left or following too closely can put you in the truck’s turning path or blind spot.
Right of way
Car A is approaching an intersection and wants to turn right. Car B is coming straight from the opposite direction. What must Car A do?
Show answer & explanation
Correct answer
B · Stop and wait for Car B to pass before turning right.
Car A is at a GIVE WAY sign and wants to turn right. Car B is coming straight from the opposite direction. What must Car A do?
The diagnostic mixes topics so you only practise what you’d miss.
Honest answers
Common right of way questions
Real questions foreigners ask before the theory test. Practice content is based on common Thai driving-test topics and public guidance; it is not an official exam database.
Who has priority at an unsignalled junction in Thailand?
The vehicle already on the main road, or already inside the intersection, has priority. If two vehicles arrive together on equal roads, the left-side priority rule is the recurring exam pattern.What should I do for emergency vehicles?
When an emergency vehicle is using its siren or flashing lights, clear the way. Move aside, stop if needed, and do not try to overtake it.Who yields at a roundabout?
Vehicles entering yield to vehicles already circulating in the roundabout. Follow local lane markings and signal before you exit.
Keep going
Related question topics
Now run them under pressure.
Sample questions get you the wording. 5 on this page, hundreds more inside the diagnostic.
