LHT or Left Hand Traffic is the system in which vehicles travel on the left side of the road. This is the opposite of RHT or Right Hand Traffic which is followed by many countries. Synonyms for LHT include Left Side Driving, Left Lane Driving or Left-Handed Driving. Countries that follow LHT include the United Kingdom, Australia, India, and Japan among others. It is important for tourists and visitors to familiarize themselves with the local driving rules and regulations before driving in a foreign country as driving on the opposite side of the road can be challenging and may lead to accidents if caution is not exercised.