<P> Some countries have borders where drivers must switch from LHT to RHT and vice versa . </P> <P> LHT Thailand has three RHT neighbours: Cambodia, Laos, Myanmar . Most of its borders use a simple traffic light to do the switch, but there are also interchanges which enable the switch while keeping up a continuous flow of traffic . </P> <P> There are four road border crossing points between Hong Kong and Mainland China . In 2006, the daily average number of vehicle trips recorded at Lok Ma Chau was 31,100 . The next largest is Man Kam To, where there is no changeover system and the border roads on the mainland side Wenjindu intersect as one - way streets with a main road . </P> <P> The Takutu River Bridge (which links LHT Guyana and RHT Brazil) is the only border in the Americas where traffic changes sides . </P>

Canada left hand drive or right hand drive