Bhutan is not a part of 1949 and 1968 Conventions of road traffic, but an  International driving permit is honored by the country.

The main road traffic rules:

• Driving is on the left site of the road.
• The minimum driving age for light vehicles is 18 years.
• Minimum driving age for driving medium and heavy vehicles is 21 years.
• Speed is measured in kilometres per hour. In towns, speed limits are from 8 km/h to 20 km/h. The maximum speed limit in urban areas is 30 km/h and 50 km/h is the maximum speed limit in the country.
• The legal blood alcohol limit is 0.08%.
• Motorcyclists must wear helmets.
• Drivers and all passengers must wear set-belts.
• It is obligatory to give right of way to police or emergency vehicles.
• It is obligatory to stop for giving way to a vehicle coming up-hill.
• It is not permitted passing to the right of a right turning vehicle.
• It is not permitted to overtake vehicles from the left or unsafe distance.
• It is required to give way pedestrians.
• It is not permitted to park vehicles in front of private drive.
• Driving on neutral gear is prohibited.

Some additional information:

• Bhutan has few roads, which are situated along the steep mountainsides. Only one road is connecting Bhutan to the outside world; it is from Thimphu to India.
• Bhutan does not have any automated traffic signals.
• Most road signs are hand-written in English.  However, some road signs are in English and Dzongkha languages.
• Typically, police officers direct traffic at roundabouts.
• Most intersections in Bhutan are typically T-junctions.
• Bhutan does not have any major highways. In mountains, roads are typically single-track with places for opposing traffic to pass.
• It is not recommended to drive at night as most roads are without street lights and road markings.
• As to parking, many roads in Bhutan are too narrow for vehicles to park.
• Thimphu and Paro are permit free zone; for driving other places, foreign drivers must obtain route permit from the immigration office in Thimphu.
• Cars can enter into Bhutan from India.
• During heavy rains, there is a risk of falling rocks and landslides which can block roads.

 Driving Overseas - Short Information