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Driving in Guam
The rules of the road as our desk recorded them, native unit first.
Driving side
Right
Speed limits
40 / 56 / 56 km/h · 25 / 35 / 35 mph
urban / rural / motorway
International permit (IDP)
Not required
A valid national licence is accepted for 30 days; US licences indefinitely.
Blood alcohol limit
0.08% (0.8 g/l)
Tolls
None.
Headlights
Not required by day.
Child seats
Required, US rules.
Right-hand traffic, US-style road signs and a 35 mph island maximum. Traffic around Tumon and Tamuning is heavy at rush hour. Military installations occupy a quarter of the island and are clearly signed as closed.