<Tr> <Td> Netherlands </Td> <Td> RHT </Td> <Td> 1906 </Td> <Td> RHT </Td> <Td> Rotterdam was LHT until 1917 . Includes Curaçao, Sint Maarten, and Aruba </Td> </Tr> <Tr> <Td> Namibia </Td> <Td> LHT </Td> <Td> 1918 </Td> <Td> </Td> <Td> RHT as a German colony . After South Africa occupied German South - West Africa during World War I, switched to LHT . South - West Africa was made a South African mandate by the League of Nations, and the new rule of the road was established in law . </Td> </Tr> <Tr> <Td> Nauru </Td> <Td> LHT </Td> <Td> 1918 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Nepal </Td> <Td> LHT </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr>

Why do some drive on the left and some on the right