Everything You Need to Know About International Driving Permits for Windward Islands
An International Driving Permit (IDP) is not legally required to drive in the Windward Islands for short-term visitors from countries like the US, UK, Canada, Australia, and the EU. However, most car rental companies across islands such as Saint Lucia, Grenada, and Saint Vincent strongly recommend or even require one — especially if your domestic license is not in English or lacks a photo.
Police checkpoints are common, particularly on main coastal roads and during festivals or holidays. Officers may request to see your driver’s license, passport, and sometimes your IDP to verify your right to drive. Having the IDP avoids confusion and speeds up these interactions, especially in rural or French-speaking territories.
Local drivers in the Windward Islands often navigate narrow, winding roads with confidence, so visitors should remain alert and cautious. Road signage varies, and in some areas, infrastructure can be minimal. Most cars are right-hand drive, and driving is on the left side of the road.
Key road rules and penalties to note:
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Seatbelts are mandatory for all passengers
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Speed limits: 20–30 mph in towns, 40–50 mph on rural roads
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Drunk driving laws are strictly enforced; the legal limit is 0.08%
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Mobile phone use while driving is prohibited unless hands-free
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Helmets are required for motorbike riders
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Most roads are toll-free, but some ferry crossings may charge a fee
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Unmarked speed bumps and potholes are common, especially after rain
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Use caution on steep, mountainous roads during wet weather
For up-to-date traffic regulations in Grenada, visit the Royal Grenada Police Force.
Want more detailed information before your trip? Be sure to check out our complete Windward Islands Driving Guide here