Thailand's traffic laws are broadly similar to most countries — ride on the left, follow the signs, don't drink and ride. In practice, Thai roads have their own rhythm and unwritten rules that take a little time to understand. This page covers the essentials — what the law requires, what is commonly enforced, and a few things worth knowing before you head out onto Thai roads for the first time.
Driving Licence Requirements
Most people riding motorbikes in Thailand are doing so on their home country licence, and for the majority of the time it is not a problem. Riding on a non-Thai licence is not strictly legal, but in most cases where it becomes an issue, it results in a small fine of 500 to 1,000 baht.
For full legal compliance: an International Driving Permit (IDP) or a Thai Driving Licence. For full details on licences, IDPs and where to get assistance by region, see our dedicated licence page.
→ Licensing Requirements for Foreigners
The Basics
Ride on the Left
Thailand drives and rides on the left side of the road. If you are from a right-hand traffic country this takes a day or two to feel natural — particularly at quiet junctions and when pulling out onto an empty road. Take it slowly until it becomes instinctive.
Speed Limits
90km/h on most open roads and 60km/h in urban areas unless otherwise signed. Ride at a speed that feels safe and comfortable for you — not at the speed of surrounding traffic if that does not feel right.
Helmets
Thai law requires all riders and passengers to wear a helmet at all times. Enforcement varies depending on the area — tourist areas and city checkpoints are more likely to enforce than quiet rural roads. Regardless of what others around you are doing, always wear a helmet.
Drink Riding
The legal blood alcohol limit in Thailand is 50mg per 100ml. Police conduct breath tests at checkpoints, particularly around public holidays and festival periods. Don't do it.
At Police Checkpoints
Checkpoints are a regular feature of Thai roads — particularly on highway entry and exit points, around major cities and during public holidays. Slow down, be polite and have your licence and documents accessible. Most checkpoints wave riders through without stopping. If stopped, stay calm, be respectful and follow the officer's instructions. Common reasons for being stopped: no helmet, no licence, random document check. Fines are modest and paid on the spot.
A Few Things Worth Knowing
- Red lights — Running red lights is common in Thailand. Do not follow this behaviour — stop at red lights and look both ways before moving on green.
- Overtaking — Thai roads have a culture of assertive overtaking. Give trucks and buses plenty of space and never overtake on blind corners or crests.
- U-turns — U-turns are common and legal at many intersections. Be aware of vehicles making U-turns at junctions — they do not always check for approaching traffic.
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