The mode of transport within Bhutan is by motor vehicles only. There are no domestic airlines or trains. Motor roads are well maintained, and the main highway runs from west to east connecting all major sightseeing places. Traffic is rarely heavy, but the mountainous terrain and winding road restrict the average speed of vehicles to less than 40 km/hour.
How to prevent Motion Sickness
There are several things one can do to minimize the possibility of contracting motion sickness on the winding mountain roads of Bhutan. A combination of the following preventative measures should ensure that motion sickness does not occur.
There are non-prescription medications that can be taken to prevent the sickness. Unfortunately, nearly all of them tend to cause drowsiness, especially in sensitive individuals. Marezine seems to be the least sleep-inducing & also the most effective. In addition, as an alternative to drugs, there are ginger capsules which can also help but don't induce sleep (these are available in health food stores). Any of these medications should be taken as least one hour prior to traveling & again as needed throughout the day's travel.
If possible, get some fresh air blowing on your face. Intermediate stops for fresh air & walking around can also be helpful.
It helps if you keep your eyes on a steady point in the distance, or focus on an object in the vehicle. Don't watch the scenery rush by.
There are special wrist bands that can be worn to provide acupressure at key wrist points which is helpful for some people.