Tonga's Motorway Speed Cap Sits at 80 km/h for 2026

Turning 18 is the legal minimum to drive in Tonga, where traffic also keeps to the left — a double adjustment for visitors from right-hand, lower-age countries. Motorway speeds top out at 80 km/h, easing to 70 km/h on rural roads and 50 km/h in towns. The blood alcohol limit is 0.08%.

Speed limits are 50 km/h in urban areas, 70 km/h on rural roads, and 80 km/h on motorways. The blood alcohol limit is 0.08% BAC. You must be at least 18 to drive.

Emergency Numbers in Tonga

General Emergency: 112 | Police: 112

Save these numbers before you start driving. In Tonga, emergency calls are free from any phone.

Speed Limits in Tonga

The default speed limits for passenger cars in Tonga are 50 km/h in built-up areas, 70 km/h on rural roads, and 80 km/h on motorways.

Trucks and vehicles over 3.5 tonnes have lower limits: 50 km/h urban, 60 km/h rural, and 60 km/h on motorways.

Important: Posted signs always override default limits. Watch for temporary restrictions in construction zones, near schools, and in residential areas.

Speeding Fines and Penalties

Speeding fines in Tonga vary based on how much you exceed the posted limit. Fines increase sharply for higher violations and may include licence points or driving bans for serious offences.

Traffic Rules and Regulations

Drive on the left side of the road. Overtake on the right. At roundabouts, traffic flows clockwise — give way to vehicles already in the roundabout.

Seatbelts are mandatory for all occupants. Children must use appropriate restraint systems based on their age and height.

Using a hand-held phone while driving is prohibited. Hands-free systems are permitted.

Use headlights in poor visibility, tunnels, and at night. Some areas require headlights at all times.

Priority at intersections follows posted signs. When no signs are present, yield to traffic from the right.

Drink-Driving Laws and Alcohol Limits

The legal blood alcohol limit in Tonga is 0.08% BAC. Exceeding this limit results in fines, licence suspension, and possible criminal charges. For novice drivers and professional drivers, stricter limits may apply.

The safest approach is to not drink at all if you will be driving. Alcohol affects reaction time and judgement regardless of the legal limit.

Tyre Requirements and Regulations

Due to Tonga’s tropical climate, winter tyres are not required. Standard tyres suitable for wet and dry conditions are appropriate year-round.

The legal minimum tread depth is 1.5 mm.

Studded tyres are prohibited in Tonga.

For detailed tyre law information, see our Tyre Laws in Tonga guide.

Driving License Requirements

Always carry your original driving licence — photocopies are not accepted.

The minimum driving age is 18 years.

Parking and Fuel

Parking in major cities can be limited and expensive. Shopping centres and commercial areas usually have dedicated car parks. Read signs carefully to avoid towing.

Most fuel stations accept major credit and debit cards. In rural areas, keep your tank above half — stations may be far apart.

Seasonal Driving Conditions

Tonga has a tropical maritime climate. The main driving hazard is heavy rainfall — roads can flood quickly and visibility drops sharply during downpours. Reduce speed in rain and avoid crossing flooded sections. Road surfaces may deteriorate during the wet season.

Practical Driving Tips for Tonga

• If switching from right-hand traffic, concentrate on turns and roundabouts — these are where most mistakes happen.
• Download offline maps of Tonga before your trip — mobile signal can be unreliable on rural roads.
• Take a break every 2 hours on long drives. Fatigue is a leading cause of road accidents.
• Use our interactive tools on this page — compare rules with your home country and calculate potential fines before you set off.