<P> Meanwhile, LHT was introduced by the British in parts of Canada (Atlantic Canada and British Columbia), Australia, New Zealand, the East Africa Protectorate (now Kenya, Tanzania and Uganda), British India, Rhodesia and the Cape Colony (now Zambia, Zimbabwe and South Africa), British Malaya (now Malaysia, Brunei and Singapore), British Guiana, and British Hong Kong . LHT was also introduced by the Portuguese Empire in Portuguese Macau, Colonial Brazil, Portuguese Timor, Portuguese Mozambique, and Portuguese Angola . </P> <P> The first keep - right law for driving in the United States was passed in 1792 and applied to the Philadelphia and Lancaster Turnpike . New York formalized RHT in 1804, New Jersey in 1813 and Massachusetts in 1821 . </P> <P> In the early 1900s some countries including Canada, Spain, and Brazil had different rules in different parts of the country . During the 1900s many countries standardised within their jurisdictions, and changed from LHT to RHT, mostly to conform with regional custom . Currently nearly all countries use one side or the other throughout their entire territory . Most exceptions are due to historical considerations and / or involve islands with no road connection to the main part of a country . China is RHT except the Special Administrative Regions of Hong Kong and Macau . The United States is RHT except the United States Virgin Islands . The United Kingdom is LHT, but its overseas territories of Gibraltar and British Indian Ocean Territory are RHT . </P> <P> Influential in Europe was the 1920 Paris Convention, which advised driving on the right - hand side of the road, in order to harmonise traffic across a continent with many borders . This was despite the fact that left - hand traffic was still widespread: in 1915 for example, LHT was introduced everywhere in the Austro - Hungarian Empire; however, three years later the Empire was split up into several countries, and they all changed eventually to RHT, notably including when Nazi Germany introduced RHT with almost immediate effect in Czechoslovakia in 1938--39 . </P>

Does china drive on the left or right side of the road
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