Uncontrolled crossroadThailand
Traffic rules
Thailand
15. Uncontrolled crossroad
An uncontrolled crossroad is an intersection where traffic priority is not specifically regulated by traffic lights, an authorised person or signs assigning priority to particular approaches. Drivers must therefore determine who has priority using the default traffic rules that apply in that country.
The applicable rule varies between countries and may include priority from the right, priority from the left or another default right-of-way rule. Drivers should approach an uncontrolled crossroad carefully, observe traffic from every direction and never assume that a wider or busier road automatically has priority.
Wikimedia.org • Xufanc • CC BY-SA
What is an uncontrolled crossroad?
An uncontrolled crossroad is an intersection where priority is not specifically assigned by traffic lights, an authorised person or priority signs. Drivers must use the default priority rules of the country.
Who has priority at an uncontrolled crossroad?
This depends on the local traffic law. Some countries use priority from the right, while others use different rules. Drivers should know the default intersection rule of the country in which they are driving.
Does the wider road automatically have priority?
Not necessarily. The width, surface or amount of traffic on a road does not by itself determine priority unless local law specifically provides otherwise.
Should you slow down at an uncontrolled crossroad?
Yes. Approach at a speed that allows you to observe approaching traffic, determine who has priority and stop safely if necessary.
Do cyclists have to follow the priority rules at an uncontrolled crossroad?
Yes. Cyclists generally follow the applicable intersection priority rules unless a specific cycle facility, sign or local rule provides otherwise.
Does driving straight ahead automatically give you priority?
No. Continuing straight ahead does not automatically give priority over traffic approaching on another road. The applicable priority rules must still be followed.
Does turning right or left change the priority rules?
Turning may create additional obligations, particularly towards pedestrians, cyclists or opposing traffic. Drivers must follow both the intersection priority rule and the rules governing the intended turn.
What if two vehicles reach an uncontrolled crossroad at the same time?
Apply the country's default priority rule. Do not rely simply on which vehicle appears to have arrived first unless local law specifically uses that rule.
What if the traffic lights at an intersection are not working?
The intersection is not necessarily completely uncontrolled. Priority signs, road markings and default priority rules may still determine who must give way. Drivers should approach with particular caution.
What should you do if you are unsure who has priority?
Reduce speed and be prepared to stop. Never force your way through an intersection simply because the priority situation is unclear.
