Thailand strictly enforces its drug laws, including those prohibiting possession of small quantities of marijuana. The U.S. Embassy frequently does not learn of the arrest of U.S. citizens for minor drug offenses. Prison conditions in Thailand are harsh, and Americans convicted of drug trafficking have received long sentences, often in excess of forty years. There are more than fifty Americans serving long term prison sentences in Thailand. The American's claim that he or she did not know that the package contained drugs has not been a successful legal defense in Thailand.
Paved roads connect Thailand's major cities, but most have only two lanes.
Slow-moving trucks limit speed and visibility. Reckless passing in mountainous regions and consumption of amphetamines or other stimulants by commercial drivers are common. Motorists may wish to consider obtaining insurance which covers medical and liability costs. The more affluent driver, even if not at fault, is frequently compelled to cover the expenses of the other party in an accident in Thailand. Heavy traffic and accidents are common in Bangkok.