Left- and right-hand traffic
Left-hand traffic (LHT) and right-hand traffic (RHT) are the practice, in bidirectional traffic, of keeping to the left side or to the right side of the road, respectively. A fundamental element to traffic flow, it is sometimes referred to as the rule of the road.
RHT is used in 165 countries and territories, with the remaining 75 countries and territories using LHT. Countries that use LHT account for about a sixth of the world's area with about 35% of its population and a quarter of its roads. In 1919, 104 of the world's territories were LHT and an equal number were RHT. From 1919 to 1986, 34 of the LHT territories switched to RHT.
Many LHT countries were formerly part of the British Empire, although some were not, such as Japan, Thailand, Indonesia, and Suriname. Conversely, many RHT countries were part of the French colonial empire.
For rail transport, LHT predominates in Western Europe (except Germany, Denmark, Austria, Spain, and the Netherlands), Latin America (except Mexico), and in countries formerly in the British and French Empires, whereas North American and central and eastern European train services operate RHT.
According to the International Regulations for Preventing Collisions at Sea, water traffic is effectively RHT: a vessel proceeding along a narrow channel must keep to starboard (the right-hand side), and when two power-driven vessels are meeting head-on both must alter course to starboard also. For aircraft the US Federal Aviation Regulations suggest RHT principles, both in the air and on water.
In LHT vehicles keep left, and cars are RHD (right-hand drive) with the steering wheel on the right-hand side and the driver sitting on the offside or side closest to the center of the road. The passenger sits on the nearside, closest to the curb. Roundabouts circulate clockwise. In RHT everything is reversed: cars keep right, the driver sits on the left side of the car, and roundabouts circulate counterclockwise.
Ancient Greek, Egyptian, and Roman troops kept to the left when marching. In 1998, archaeologists found a well-preserved double track leading to a Roman quarry near Swindon, in southern England. The grooves in the road on the left side (viewed facing down the track away from the quarry) were much deeper than those on the right side, suggesting LHT, at least at this location, since carts would exit the quarry heavily loaded, and enter it empty. In the year 1300, Pope Boniface VIII directed pilgrims to keep left.
The first reference in English law to an order for LHT was in 1756, with regard to London Bridge. The United Kingdom is LHT, but its overseas territories of Gibraltar and British Indian Ocean Territory are RHT. In the late 1960s, the UK Department for Transport considered switching to RHT, but declared it unsafe and too costly for such a built-up nation. Road building standards, for motorways in particular, allow asymmetrically designed road junctions, where merge and diverge lanes differ in length.
Sweden switched to RHT in 1967, having been LHT since from about 1734 despite having land borders with RHT countries, and approximately 90 percent of cars being left-hand drive (LHD) vehicles. A referendum was held in 1955, with an overwhelming majority voting against a change to RHT. Nevertheless, some years later the government ordered a conversion, which took place at 5 am on Sunday, 3 September 1967. The accident rate dropped sharply after the change, but soon rose back to near its original level. The day was known as Högertrafikomläggningen or Dagen H for short. When Iceland switched the following year, it was known as Hægri dagurinn or H-dagurinn. Most passenger cars in Iceland were already LHD.
LHT was used in the Austro-Hungarian Empire, and when the empire was split up, the countries all changed eventually to RHT. Austria switched sides in 1921 in Vorarlberg, 1930 in North Tyrol, 1935 in Carinthia and East Tyrol, and in 1938 in the rest of the country. Partitions of Poland changed to RHT in the 1920s, Partitions belonging to the German Empire and the Russian Empire were RHT. Croatia-Slavonia switched to RHT on joining the Kingdom of Yugoslavia, although Istria and Dalmatia were already RHT. Nazi Germany introduced the switch to right-hand traffic in Czechoslovakia and Slovakia in 1938–39. West Ukraine was LHT, although the rest of Ukraine, having been part of the Russian Empire, already drove on the right. In Romania Transylvania, the Banat and Bukovina were LHT until 1919, while Wallachia and Moldavia were already RHT.
In Italy the countryside was RHT while cities were LHT until 1927. Rome changed to RHT in 1924 and Milan in 1926. Alfa Romeo and Lancia did produce RHD cars until as late as 1950 and 1953 respectively only to special order, as many drivers favoured the RHD layout even in RHT as this offered the driver a clearer view of the edge of the road in mountainous regions at a time when many such roads lacked barriers or walls. The Rome Metro uses LHT.
Rotterdam was LHT until 1917, although the rest of the Netherlands was RHT.
Today, four countries in Europe continue to use left-hand traffic, all island nations: the UK, Cyprus, Ireland, and Malta.
LHT was introduced in British West Africa. All of the countries formerly part of this colony have borders with former French RHT jurisdictions and have switched to RHT since decolonization. These include Ghana, The Gambia, Sierra Leone, and Nigeria. LHT was introduced by the British in the East Africa Protectorate (now Kenya, Tanzania and Uganda), Rhodesia, and the Cape Colony (now Zambia, Zimbabwe and South Africa). All of these have remained LHT. Sudan, formerly part of Anglo-Egyptian Sudan switched to RHT in 1973, as it is surrounded by neighbouring RHT countries.
The Portuguese Empire (then LHT), introduced that to Portuguese Mozambique and Portuguese Angola. Although Portugal itself switched to RHT in 1928, these territories remained LHT as they have land borders with former British colonies. Other former Portuguese colonies in Africa that switched sides in 1928 including Guinea-Bissau, São Tomé and Príncipe, and Cape Verde.
The French introduced RHT in French West Africa and the Maghreb, where it is still used. Countries in this former colony include Mali, Mauritania, Ivory Coast, Burkina Faso, Benin, Niger, Morocco, Algeria, and Tunisia. Other French former colonies that are RHT include Burundi, Cameroon, Central African Republic, Chad, Democratic Republic of the Congo, Djibouti, Gabon, and the Republic of the Congo.
Rwanda and Burundi, former Belgian colonies in Central Africa, are RHT but are considering switching to LHT like neighbouring members of the East African Community (EAC). A survey, carried out in 2009, indicated that 54% of Rwandans were in favour of the switch. Reasons cited were the perceived lower costs of RHD vehicles as opposed to LHD versions of the same model, easier maintenance and the political benefit of harmonisation of traffic regulations with other EAC countries. The same survey also indicated that RHD cars are 16 to 49 per cent cheaper than their LHD equivalents. In 2014 an internal report from consultants to the Ministry of Infrastructure recommended a switch to LHT. In 2015, the ban on RHD vehicles was lifted; RHD trucks from neighbouring countries cost $1000 less than LHD models imported from Europe.
In what is now Canada, LHT was introduced by the British in British Columbia, which changed to RHT in stages from 1920 to 1923, and New Brunswick, Nova Scotia, and Prince Edward Island which changed in 1922, 1923, and 1924 respectively. The Dominion of Newfoundland changed to RHT in 1947 while still a British colony, two years before joining Canada. Former parts of New France have always been RHT.
In the late 1700s, traffic in the United States was RHT based on teamsters' use of large freight wagons pulled by several pairs of horses. The wagons had no driver's seat, so the (typically right-handed) postilion held his whip in his right hand and thus sat on the left rear horse. Seated on the left, the driver preferred that other wagons pass him on the left so that he could be sure to keep clear of the wheels of oncoming wagons. 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. Today the United States is RHT except the United States Virgin Islands, which is LHT like many neighboring islands.
In the West Indies, colonies and territories drive on the same side as their parent countries, except for the United States Virgin Islands. Many of the island nations are former British colonies and drive on the left, including Jamaica, Antigua and Barbuda, Barbados, Dominica, Grenada, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, and The Bahamas.
LHT was introduced by the British in British India (now India, Pakistan, Myanmar, and Bangladesh), British Malaya (now Malaysia, Brunei and Singapore), and British Hong Kong. All are still LHT except Myanmar, which switched to RHT in 1970, although much of its infrastructure still geared to LHT. Most cars are used RHD vehicles imported from Japan. Afghanistan was LHT until the 1950s, in line with neighbouring British India and later Pakistan.
LHT was introduced by the Portuguese Empire in Portuguese Macau (now Macau) and Portuguese Timor (now East Timor). Both places are still LHT, despite Macau now being part of RHT China, requiring a right-to-left switching interchange at the Lotus Bridge which connects the two. East Timor shares the island of Timor with Indonesia, which is also LHT, although the former (then Portuguese Timor) switched to RHT along with Portugal in 1928 before changing back to LHT in 1976 during the Indonesian occupation of East Timor.
China is RHT except the Special Administrative Regions of Hong Kong and Macau. LHT was uniform in the 1930s, then the northern provinces were RHT. Nationalist China adopted RHT in 1946. This convention was preserved when the CCP took the mainland and the KMT retreated to Taiwan.
The Philippines was mostly LHT during its Spanish and American colonial periods, as well as during the Commonwealth era. During the Japanese occupation, the Philippines remained LHT, also because LHT had been required by the Japanese; but during the Battle of Manila, the liberating American forces drove their tanks to the right for easier facilitation of movement. RHT was formalised in 1945.
In Japan, Post-World War II Okinawa was ruled by the United States Civil Administration of the Ryukyu Islands and was RHT. It was returned to Japan in 1972 but did not convert back to LHT until 1978. The conversion operation was known as 730 (Nana-San-Maru, which refers to the date of the changeover, 30 July). Okinawa is one of few places to have changed from RHT to LHT in the late 1900s.
Vietnam became RHT as part of French Indochina, as did Cambodia. In the latter country, RHD cars, many of which were smuggled from Thailand, were banned from 2001, even though they accounted for 80% of vehicles in the country.
Samoa, a former German colony, had been RHT for more than a century. It switched to LHT in 2009, being the first territory in almost 30 years to switch. The move was legislated in 2008 to allow Samoans to use cheaper right-hand drive (RHD) vehicles—which are better suited for left-hand traffic—imported from Australia, New Zealand or Japan, and to harmonise with other South Pacific nations. A political party, The People's Party, was formed to try to protest against the change, a protest group which launched a legal challenge, and an estimated 18,000 people attending demonstrations against it. The motor industry was also opposed, as 14,000 of Samoa's 18,000 vehicles are designed for RHT and the government has refused to meet the cost of conversion. After months of preparation, the switch from right to left happened in an atmosphere of national celebration. There were no reported incidents. At 05:50 local time, Monday 7 September, a radio announcement halted traffic, and an announcement at 6:00 ordered traffic to switch to LHT. The change coincided with more restrictive enforcement of speeding and seat-belt laws. That day and the following day were declared public holidays, to reduce traffic. The change included a three-day ban on alcohol sales, while police mounted dozens of checkpoints, warning drivers to drive slowly.
Brazil was a colony of Portugal and switched to RHT with Portugal in 1928. Other Central and South American countries that later switched from LHT to RHT include Argentina, Chile, Panama, Paraguay, and Uruguay.
Comparing accident statistics between countries operating either LHT or RHT, Leeming concluded that LHT is superior. However, Watson has criticised the small sample size and dismisses the notion.
Changing sides at bordersEdit
Although many LHT jurisdictions are on islands, there are cases where vehicles may be driven from LHT across a border into a RHT area. Such borders are mostly located in Africa and southern Asia. The Vienna Convention on Road Traffic regulates the use of foreign registered vehicles in the 74 countries that have ratified it.
LHT Thailand has three RHT neighbors: Cambodia, Laos, and 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.
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.
Although the United Kingdom is separated from Continental Europe by the English Channel, the level of cross-Channel traffic is very high; the Channel Tunnel alone carries 3.5 million vehicles per year by the Eurotunnel Shuttle between the UK and France.
Road vehicle configurationsEdit
Driver seating positionEdit
In RHT jurisdictions, vehicles are configured with LHD, with the driver sitting on the left side. In LHT jurisdictions, the reverse is true. The driver's side, the side closest to the centre of the road, is sometimes called the offside, while the passenger side, the side closest to the side of the road, is sometimes called the nearside.
Most windshield wipers are designed to clear the driver's side better and have a longer blade on the driver's side and wipe up from the passenger side to the driver's side. Thus on LHD configurations, they wipe up from right to left, viewed from inside the vehicle, and do the opposite on RHD vehicles.
Historically there was less consistency in the relationship of the position of the driver to the handedness of traffic. Most American cars produced before 1910 were RHD. In 1908 Henry Ford standardised the Model T as LHD in RHT America, arguing that with RHD and RHT, the passenger was obliged to "get out on the street side and walk around the car" and that with steering from the left, the driver "is able to see even the wheels of the other car and easily avoids danger." By 1915 other manufacturers followed Ford's lead, due to the popularity of the Model T.
In specialised cases, the driver will sit on the nearside, or kerbside. Examples include:
- Where the driver needs a good view of the nearside, e.g. street sweepers, or vehicles driven along unstable road edges.
- Where it is more convenient for the driver to be on the nearside, e.g. delivery vehicles. The Grumman LLV postal delivery truck is widely used with RHD configurations in RHT North America. Some Unimogs are designed to switch between LHD and RHD to permit operators to work on the more convenient side of the truck.
Generally, the convention is to mount a motorcycle on the left, and kickstands are usually on the left which makes it more convenient to mount on the safer kerbside as is the case in LHT. Some jurisdictions prohibit fitting a sidecar to a motorcycle's offside.
Headlamps and other lighting equipmentEdit
Most low-beam headlamps produce an asymmetrical light suitable for use on only one side of the road. Low beam headlamps in LHT jurisdictions throw most of their light forward-leftward; those for RHT throw most of their light forward-rightward, thus illuminating obstacles and road signs while minimising glare for oncoming traffic.
In Europe, headlamps approved for use on one side of the road must be adaptable to produce adequate illumination with controlled glare for temporarily driving on the other side of the road,:p.13 ¶5.8. This may be achieved by affixing masking strips or prismatic lenses to a part of the lens or by moving all or part of the headlamp optic so all or part of the beam is shifted or the asymmetrical portion is occluded.:p.13 ¶5.8.1 Some varieties of the projector-type headlamp can be fully adjusted to produce a proper LHT or RHT beam by shifting a lever or other movable element in or on the lamp assembly.:p.12 ¶5.4 Some vehicles adjust the headlamps automatically when the car's GPS detects that the vehicle has moved from LHT to RHT and vice versa.
Rear fog lampsEdit
In the European Union, vehicles must be equipped with one or two red rear fog lamps. A single rear fog lamp must be located between the vehicle's longitudinal centreline and the outer extent of the driver's side of the vehicle.
Crash testing differencesEdit
An Australian news source reports that some RHD cars imported to that country did not perform as well on crash tests as the LHD versions, although the cause is unknown, and may be due to differences in testing methodology.
In most countries, rail traffic travels on the same side as road traffic. However, in many cases railways were built, often using LHT British technology, and road traffic switch the RHT while rail remained LHT. Examples include: Argentina, Belgium, Bolivia, Cambodia, Chile, Egypt, France, Iraq, Israel, Italy, Laos, Monaco, Myanmar, Nigeria, Peru, Portugal, Senegal, Slovenia, Sweden, Switzerland, Taiwan, Tunisia, Venezuela, and Yemen. In countries such as Indonesia it is the reverse (RHT for rails and LHT for roads). France is mainly LHT for trains, except for the classic lines in Alsace-Lorraine which belonged to Germany when the railways were built before 1918. Metros and light rail sides of operation vary, and might not match railways or roads in their country. Trams generally operate at the same side as a road traffic due to a common sections with roads.
Worldwide distribution by countryEdit
Of the 195 countries currently recognised by the United Nations, 141 use RHT and 54 use LHT on roads in general. A country and its territories and dependencies is counted once. Whichever directionality is listed first is the type that is used in general in the traffic category.
|Country||Road traffic||Road switched sides||Notes, exceptions|
|Algeria||RHT||French Algeria until 1962.|
|Andorra||RHT||Landlocked between France and Spain.|
|Angola||RHT||1928||Portuguese colony until 1975.|
|Antigua and Barbuda||LHT||British colony until 1958. Caribbean island.|
|Argentina||RHT||1945||The anniversary on 10 June is still observed each year as Día de la Seguridad Vial (road safety day).|
|Australia||LHT||British colony before 1901. Island nation. Includes Norfolk Island.|
|Bahamas||LHT||British colony before 1973. Caribbean island.|
|Bahrain||RHT||1967||Former British protectorate. Switched to same side as neighbours.|
|Bangladesh||LHT||Part of British India before 1947.|
|Barbados||LHT||British colony before 1966. Caribbean archipelagic state.|
|Belize||RHT||1961||Former British colony. Switched to same side as neighbours.|
|Benin||RHT||Part of French West Africa before 1960.|
|Bhutan||LHT||Under British protection before 1949.|
|Bosnia and Herzegovina||RHT||1918||Switched sides after the collapse of Austria-Hungary.|
|Brunei||LHT||UK protection until 1984.|
|Burkina Faso||RHT||Part of French West Africa before 1958.|
|Burundi||RHT||Belgian colony before 1962.|
|Cape Verde||RHT||1928||Portuguese colony until 1975.|
|Central African Republic||RHT||French colony before 1960.|
|Chad||RHT||French colony before 1960.|
|China||RHT/LHT||1946||RHT in the Mainland, whereas Hong Kong and Macau are LHT due to their colonial heritage.|
|Comoros||RHT||French colony before 1975.|
|Republic of Congo||RHT||French colony before 1960.|
|Democratic Republic of Congo||RHT||Belgian colony before 1960.|
|Côte d'Ivoire||RHT||Part of French West Africa before 1960.|
|Cyprus||LHT||Under UK administration before 1960. Island nation.|
|Denmark||RHT||Includes Faroe Islands and Greenland|
|Dominica||LHT||British colony before 1978. Caribbean island.|
|East Timor||LHT||1976||Portuguese colony until 1975. Switched to RHT with Portugal in 1928, under the Indonesian annexation, it was switched back to LHT in 1976.|
|Eritrea||RHT||1964||Italian colony before 1942.|
|Eswatini (Swaziland)||LHT||Former Portuguese colony. Continues to drive on the same side as neighboring countries.|
|Fiji||LHT||British colony before 1970. Island nation.|
|France||RHT||1792||Includes French Polynesia, New Caledonia, Saint Pierre and Miquelon, Wallis and Futuna, French Guiana, Réunion, Saint Barthélemy, Collectivity of Saint Martin, Guadeloupe, Mayotte.|
|Gambia||RHT||1965||British colony until 1965. Switched to RHT being surrounded by neighboring former French colonies.|
|Georgia||RHT||About 40% vehicles in Georgia are RHD due to the low cost of used cars imported from Japan.|
|Ghana||RHT||1974||British colony until 1957. Ghana switched to RHT in 1974, a Twi language slogan was "Nifa, Nifa Enan" or "Right, Right, Fourth". Ghana has also banned RHD vehicles. Ghana prohibited new registrations of RHD vehicles after 1 August 1974, three days before the traffic change.|
|Grenada||LHT||British colony before 1974. Caribbean island.|
|Guinea-Bissau||RHT||1928||Portuguese colony until 1974.|
|Guyana||LHT||British colony until 1970. One of the few countries in continental Americas are in LHT.|
|Holy See||RHT||Enclave of Rome.|
|Hungary||RHT||1941||Originally LHT, like most of Austria-Hungary.|
|India||LHT||Part of British India before 1947.|
|Indonesia||LHT||Roads and railways were built by the Dutch, with LHT for roads to conform to Asian standards and RHT for railways. The Jakarta MRT and Palembang LRT also use RHT.|
|Ireland||LHT||Part of the United Kingdom before 1922.|
|Jamaica||LHT||British colony before 1962. Caribbean island.|
|Kenya||LHT||Part of the British East Africa Protectorate before 1963.|
|Kiribati||LHT||UK colony before 1979. Pacific islands.|
|North Korea||RHT||1946||Was LHT during the period of Japanese rule. Switched to RHT after Surrender of Japan.|
|Kyrgyzstan||RHT||Former part of RHT Soviet Union. In 2012, over 20,000 cheaper used RHD cars were imported from Japan.|
|Laos||RHT||RHT implemented while part of French Indochina.|
|Lebanon||RHT||French Mandate of Lebanon before 1946.|
|Lesotho||LHT||Enclave of LHT South Africa.|
|Libya||RHT||Italian Libya colony from 1911 to 1947.|
|Liechtenstein||RHT||Landlocked between Switzerland and Austria.|
|Malawi||LHT||British colony before 1964.|
|Malaysia||LHT||British colony before 1957.|
|Maldives||LHT||British colony before 1965. Island nation.|
|Mali||RHT||Part of French West Africa before 1960.|
|Malta||LHT||British colony before 1964. Island nation.|
|Mauritania||RHT||Part of French West Africa before 1960. Mining roads between Fderîck and Zouérat are LHT.|
|Mauritius||LHT||British colony before 1968. Island nation.|
|Mozambique||LHT||Portuguese colony until 1975.|
|Myanmar||RHT||1970||Part of British India until 1948. Switched to RHT in 1970.|
|Netherlands||RHT||1906||Includes Curaçao, Sint Maarten, and Aruba|
|Namibia||LHT||1918||Administered by South Africa 1920-1990.|
|Nauru||LHT||1918||Administered by Australia, New Zealand and the United Kingdom until 1968. Island nation.|
|Nepal||LHT||Never colonized, land border with LHT India.|
|New Zealand||LHT||British colony before 1947. Pacific island, including territories Niue and Cook Islands|
|Niger||RHT||Part of French West Africa before 1958.|
|Nigeria||RHT||1972||British colony until 1960. Switched to RHT being surrounded by neighboring former French colonies.|
|Pakistan||LHT||Part of British India before 1947.|
|Papua New Guinea||LHT||After Australia occupied German New Guinea during World War I, switched to LHT.|
|Philippines||RHT||1946||Was LHT during the Spanish and American colonial periods. Switched to RHT during Battle of Manila in 1945. Philippine National Railways switched to RHT in 2010.|
|Portugal||RHT||1928||Colonies Goa, Macau and Mozambique, which had land borders with LHT countries, did not switch and continue to drive on the left. The Porto Metro uses RHT.|
|Romania||RHT||1919||Parts of Romania formerly belonged to Austria-Hungary were LHT until 1919.|
|Russia||RHT||In the Russian Far East RHD vehicles are common due to the import of used cars from nearby Japan. Railway between Moscow and Ryazan, Sormovskaya line in Nizhny Novgorod Metro and Moskva River cable car use LHT.|
|Saint Kitts and Nevis||LHT||British colony before 1967. Caribbean island.|
|Saint Lucia||LHT||British colony before 1979. Caribbean island.|
|Saint Vincent and the Grenadines||LHT||British colony before 1979. Caribbean island.|
|Samoa||LHT||2009||Switched to LHT to allow for cheaper importation of cars from Australia, New Zealand and Japan.|
|San Marino||RHT||Enclaved state surrounded by Italy.|
|São Tomé and Príncipe||RHT||1928||Portuguese colony until 1975.|
|Senegal||RHT||Part of French West Africa before 1960.|
|Serbia||RHT||Vojvodina was LHT while part of Austria-Hungary.|
|Seychelles||LHT||British colony before 1976. Island nation.|
|Sierra Leone||RHT||1971||British colony unitl 1961. Switched to RHT being surrounded by neighboring former French colonies. Banned the importation of RHD vehicles in 2013.|
|Singapore||LHT||British colony until 1963 and was part of Malaysia until 1965.|
|Solomon Islands||LHT||British colony before 1975. Island nation.|
|South Africa||LHT||British colony before 1909.|
|South Sudan||RHT||1973||Former part of Anglo-Egyptian Sudan.|
|Spain||RHT||1924||Up to the 1920s Barcelona was RHT, and Madrid was LHT until 1924. The Madrid Metro still uses LHT.|
|Sri Lanka||LHT||British Ceylon 1815-1948.|
|Suriname||LHT||1920s||Dutch colony until 1975. One of the few countries in continental Americas are in LHT.|
|Sweden||RHT||1967 (3 September)||The day of the switch was known as Dagen H. Most passenger cars were already LHD.|
|Taiwan||RHT||1946||Was LHT during the period of Japanese rule. The government of the Republic of China changed Taiwan to RHT in 1946 along with the rest of China.|
|Tanzania||LHT||Part of the British East Africa Protectorate until 1961.|
|Thailand||LHT||One of the few LHT countries not a former British colony. Shares long land border with RHT Laos and Cambodia.|
|Tonga||LHT||British protectorate before 1970. Polynesian island nation.|
|Trinidad and Tobago||LHT||British colony before 1962. Caribbean island.|
|Tunisia||RHT||French RHT was enforced in the French protectorate of Tunisia from 1881.|
|Tuvalu||LHT||British colony before 1974. Island nation.|
|Uganda||LHT||UK Uganda Protectorate 1894-1962.|
|United Arab Emirates||RHT|
|Includes Crown dependencies and Overseas Territories Isle of Man, Guernsey, Jersey, Anguilla, Bermuda, British Virgin Islands, Cayman Islands, Falkland Islands, Montserrat, Pitcairn Islands (unregistered), Turks and Caicos Islands, Saint Helena, Ascension, Tristan da Cunha are all LHT. Gibraltar has been RHT since 1929 because of its land border with Spain. The British Indian Ocean Territory is the only other overseas territory driving on the right. The Channel Islands (Jersey and Guernsey) drove on the right under German occupation until their liberation in 1945.|
|United States||RHT/LHT||U.S. Virgin Islands, like much of the Caribbean, is LHT and is the only American jurisdiction that still has LHT, because the islands drove on the left when the US purchased the former Danish West Indies in the 1917 Treaty of the Danish West Indies.|
|Uruguay||RHT||1945||Became LHT in 1918, but as in some other countries in South America, changed to RHT on 2 September 1945. A speed limit of 30 km/h (19 mph) was observed until 30 September for safety.|
|Vanuatu||RHT||Co-administrated under France and United Kingdom until 1980.|
|Western Sahara||RHT||Occupied by Spain until the late 1900s.|
|Yemen||RHT||1977||South Yemen, formerly the British colony of Aden, changed to RHT in 1977. A series of postage stamps commemorating the event was issued. North Yemen was already RHT.|
|Zambia||LHT||UK colony before 1964.|
|Zimbabwe||LHT||UK colony before 1965.|
- Kincaid, Peter (December 1986). The Rule of the Road: An International Guide to History and Practice. Greenwood Press. pp. 50, 86–88, 99–100, 121–122, 198–202. ISBN 978-0-313-25249-5.
- "Worldwide Driving Orientation by Country". Retrieved 13 December 2016.
- Barta, Patrick. "Shifting the Right of Way to the Left Leaves Some Samoans Feeling Wronged". The Wall Street Journal. Retrieved 4 December 2016.(subscription required)
- Watson, Ian. "The rule of the road, 1919–1986: A case study of standards change" (PDF). Retrieved 30 November 2016.
- FAR Sec. 91.115(c): "When aircraft, or an aircraft and a vessel, are approaching head-on, or nearly so, each shall alter its course to the right to keep well clear."
- Anderson, Charles (2003). Puzzles and Essays from the Exchange Essays. Haworth Information Press. pp. 2–3.
- Walters, Bryn. "Huge Roman Quarry found in North Wiltshire" (PDF). ARA the Bulletin of the Association for Roman Archaeology. Autumn 1998 (Six): 8–9. ISSN 1363-7967. Retrieved 7 October 2016.
- Hamer, Mike (25 December 1986 – 1 January 1987). "Left is right on the road". New Scientist (20 December 1986/1 January 1987): 16–18. Retrieved 7 October 2016.
- Tom Geoghegan (7 September 2009). "Could the UK drive on the right?". BBC News Magazine. BBC. Retrieved 4 July 2012.
- "Layout of Grade Separated Junctions" (PDF). The Highways Agency. 2006: 4.9ff.
- "Högertrafik" (in Swedish). vardo.aland.fi. Archived from the original on 3 December 2007. Retrieved 11 August 2006.
- Réalités, Issues 200–205, Société d'études et publications économiques, 1967, page 95
- "Sweden: Switch to the Right". Time. 15 September 1967. Archived from the original on 18 October 2012. Retrieved 31 October 2012.
- Mieszkowski, Katharine (14 August 2009). "Salon News: Whose side of the road are you on?". Salon. Retrieved 12 December 2010.
- 45 ár frá hægri umferð, Morgunblaðið, 26 May 2013 English translation
- "1938 wechselte man nicht nur die Straßenseite - ARGUS Steiermark - DIE RADLOBBY". graz.radln.net. Retrieved 4 April 2019.
- "Krakowska Komunikacja Miejska – autobusy, tramwaje i krakowskie inwestycje drogowe – History of the Cracow tram network". Komunikacja.krakow.eurocity.pl. 28 November 1982. Retrieved 11 May 2009.
- Baedeker, Karl (1900). "Austria, including Hungary, Transylvania, Dalmatia and Bosnia". p. xiii–xiv. Retrieved 28 July 2017.
In Styria, Upper and Lower Austria, Salzburg, Carniola, Croatia, and Hungary we keep to the left, and pass to the right in overtaking; in Carinthia, Tyrol, and the Austrian Littoral (Adriatic coast: Trieste, Gorizia and Gradisca, Istria and Dalmatia) we keep to the right and overtake to the left. Troops on the march always keep to the right side of the road, so in whatever part of the Empire you meet them, keep to the left.
- Vasold, Manfred (2010). "Obacht! Linksverkehr" (PDF). Kultur & Technik. Retrieved 13 December 2016.
- "Seventy-five years of driving on the right". Radio Prague. 18 March 2014.
- John, Honest (28 March 2008). "Sight for sure eyes, Honest John's Agony Column". The Daily Telegraph. Retrieved 28 March 2008.
- Nick Georgano, ed. (2000). "Lancia". The Beaulieu Encyclopedia of the Automobile (Vol. 2: G-O ed.). Taylor & Francis. p. 867. ISBN 978-1-57958-293-7.
- "Högertrafik i Sverige och Finland". aland.net.
- "De geschiedenis van het linksrijden". Engelfriet.net. Retrieved 14 May 2014.
- Tourist and Business Directory – The Gambia, 1969, page 19
- Nkwame, Marc (27 July 2013). "Burundi, Rwanda to start driving on the left". DailyNews Online. Retrieved 28 May 2016.
- Peter. "Rwanda to adopt EAC driving standards". Rwanda Transport. Retrieved 12 August 2013.
- "Rwanda wants to drive on the left". Independent.co.ug. 3 June 2012. Retrieved 10 June 2012.
- "East Africa: Rwanda Looks to the Left". allAfrica.com. 27 September 2010. Retrieved 10 June 2012.
- Bari, Dr Mahabubul (29 July 2014). "The study of the possibility of switching driving side in Rwanda". European Transport Research Review. 6 (4): 439–453. doi:10.1007/s12544-014-0144-2.
- Right-hand-drive vehicles return on Rwandan roads, The East African, 13 March 2015
- Tumwebaze, Peterson (9 September 2014). "Govt okays importation of RHD trucks, to decide on other vehicle categories in October". The New Times. Retrieved 29 October 2014.
- "Change of Rule of Road in British Columbia 1920" (PDF). The British Columbia Road Runner. March 1966. Retrieved 27 August 2017.
- Griffin, Kevin (1 January 2016). "Week in History: Switching from the left was the right thing to do". The Vancouver Sun. Retrieved 26 August 2017.
- Smith, Ivan. "Highway Driving Rule Changes Sides". History of Automobiles – The Early Days in Nova Scotia, 1899–1949. Archived from the original on 8 August 2018. Retrieved 27 August 2017.
- Dyer, Gwynne (30 August 2009). "A triumph for left over right". Winnipeg Free Press. Retrieved 27 August 2017.
- "The day New Brunswick switched to driving on the right". CBC. Retrieved 11 April 2019.
- Why We Drive on the Right of the Road, Popular Science Monthly, Vol.126, No.1, (January 1935), p.37. Bonnier Corporation. January 1935. Retrieved 25 April 2012.
- Weingroff, Richard. "On The Right Side of the Road". United States Department of Transportation. Retrieved 10 January 2014.
- "An Act Establishing the Law of the Road". Massachusetts General Court. Retrieved 14 February 2014.
- "Travel Tips | US Virgin Islands". Usvitourism.vi. Retrieved 25 April 2012.
- "The Unique World of Burmese Driving". a minor diversion. 14 March 2012. Retrieved 28 September 2015.
- Myanmar’s car market set to take new direction, Motokazu Matsui and Takemi Nakagawa, Financial Times, 2 January 2017
- L. R. Reddy (2002). Inside Afghanistan: End of the Taliban Era?. APH. ISBN 9788176483193. Retrieved 31 August 2015.
- Plaza Mayor de Manila, by José Honorato Lozano (1815/21(?)-1885), in the album Vistas de las islas Filipinas y trajes de sus habitantes, published 1847. Collection of the Biblioteca Nacional de España.
- "ESCOLTA MANILA PHILIPPINES- YEAR 1903". 6 March 2010. Retrieved 14 March 2017 – via YouTube.
- "Manila – Castillian Memoirs 1930s". 19 April 2008. Retrieved 14 March 2017 – via YouTube.
- "Manila, Queen of the Pacific 1938". 6 May 2008. Retrieved 14 March 2017 – via YouTube.
- Goupal, Lou (26 June 2013). "Manila Nostalgia: Dewey Boulevard during the Japanese occupation". Manila Nostalgia. Retrieved 14 March 2017 – via YouTube.
Original video clips from a Japanese propaganda film shot in early 1942.
- Tadeo, Patrick Everett (10 March 2015). "How the Philippines became a left-hand-drive country". Top Gear Philippines. Retrieved 14 March 2017.
- "Executive Order No. 34, s. 1945". officialgazzete.gov.ph.
- Andrew H. Malcolm (5 July 1978). "U-Turn for Okinawa: From Right-Hand Driving to Left; Extra Policemen Assigned". The New York Times. p. A2.
- "Cambodia bans right-hand drive cars". BBC News. 1 January 2001. Retrieved 12 January 2007.
- Bryant, Nick (7 September 2009). "Samoan cars ready to switch sides". BBC News. Retrieved 7 September 2009.
- Askin, Pauline (7 September 2009). "Outcry as Samoa motorists prepare to drive on left". Reuters. Retrieved 7 September 2009.
- Dyer, Gwynne (1 September 2009). "Right-to-life plea fails to sway Samoan court in road appeal". The New Zealand Herald. Retrieved 5 November 2011.
- Dobie, Michael (6 September 2009). "Samoa drivers brace for left turn". BBC News. Retrieved 7 September 2009.
- "Samoan drivers change from right-hand side of the road to the left". Herald Sun. Retrieved 31 October 2012.
- Jackson, Cherelle (25 July 2008). "Samoa announces driving switch date". The New Zealand Herald. Retrieved 10 June 2012.
- "Decreto nº 18.323, de 24 de Julho de 1928". Cãmara dos Deputados. Retrieved 11 April 2019.
- Panama Shifts To Right Handed Driving Of Cars, Chicago Tribune, 25 April 1943
- De izquierda a derecha, ABC Color, 2 March 2014
- "Compilation of Foreign Motor Vehicle Import Requirements" (PDF). United States Department of Commerce International Trade Administration Office of Transportation and Machinery. December 2015. Retrieved 9 April 2019.
- Leeming, J. J. 1969. Road accidents: prevent or punish? London: Cassell
- Jennings, Ken. "What Happens When Left-Hand Roads Meet Right-Hand Roads". Conde Nast Traveler. Retrieved 18 November 2016.
- "Hong Kong 2006 – Transport – Cross-Boundary Traffic". Government of Hong Kong. 15 August 2007. Retrieved 12 December 2010.
- "Takutu bridge opens to traffic". Stabroeknews.com. 27 April 2009. Retrieved 12 December 2010.
- "Nearside (dictionary definition)". Dictionary.reverso.net. Retrieved 12 December 2010.
- Unrau, Jason. "Why Is One Wiper Blade Longer Than the Other?". Your Mechanic. Retrieved 15 April 2019.
- Miller, Wayne (2015). Car Crazy: The Battle for Supremacy between Ford and Olds and the Dawn of the Automobile Age. PublicAffairs. p. 279. ISBN 9781610395526. Retrieved 12 December 2016.
- LHD Specialist: Location of the Steering Wheel Archived 21 September 2011 at the Wayback Machine
- Hinchliffe, Mark (11 March 2014). "How to mount your motorbike". Retrieved 11 December 2016.
- "MOUNTING AND DISMOUNTING A MOTORCYCLE". Motorcycle Test Tips. Retrieved 11 December 2016.
- "S.I. No. 5/2003 – Road Traffic (Construction and Use of Vehicles) Regulations 2003". Irish Statute Book. 42. (1). Retrieved 6 November 2017.
where a side–car is attached to a mechanically propelled bicycle, the side–car shall be ... fitted on the left side of the vehicle; "Motorcycle Sidecar & Trailer legislation". MAG Ireland. Irish Motorcyclists Association. 9 February 2014. Retrieved 6 November 2017.
- "The Road Vehicles (Construction and Use) Regulations 1986 – Section 93". UK Government. 25 June 1986. Retrieved 9 December 2012.
- "UN Regulation 112, "Motor vehicle headlamps emitting an asymmetrical passing beam or a driving beam or both and equipped with filament lamps"" (PDF).
- "UN Regulation 48" (PDF).
- "Popular family SUV Hyundai Tucson slammed for 'four-star' Australian crash test result". Retrieved 5 November 2017.
- "Strasbourg to Paris Driver's eye view PREVIEW". Video 125. Retrieved 11 March 2019 – via YouTube.
- "Driving Tips in Albania - Sixt rent a car". www.sixt.co.uk. Retrieved 3 April 2019.
- http://www.nyszone.com. "Driving in Algeria". www.adcidl.com. Retrieved 3 April 2019.
- Focus, Expat. "Andorra - Driving and Transportation | ExpatFocus.com". www.expatfocus.com. Retrieved 3 April 2019.
- "Driving Tips in Angola - Sixt rent a car". www.sixt.co.uk. Retrieved 3 April 2019.
- "Road Safety Guidelines For Visitors - Drive-a-Matic Car Rentals Antigua". www.antiguarentalcar.com. Retrieved 3 April 2019.
- "10 de Junio: Día Mundial de la Seguridad Vial". Retrieved 13 December 2016.
- Staff, Weekly (10 January 2018). "Armenian Government Plans to Ban Right-Hand Drive Vehicles; Drivers Protest Decision". The Armenian Weekly. Retrieved 3 April 2019.
- Bahrain Government Annual Reports, Times of India Press, 1968, page 158
- "The history of left- and right-hand traffic". International Driving Authority. Retrieved 11 April 2019.
- "Driving in Belarus". autoeurope. Retrieved 11 April 2019.
- Sputnik. ""Выживут" ли праворульные машины в Грузии". sputnik-georgia.ru. Retrieved 26 June 2018.
- Hillger, Don; Toth, Garry. "Right-Hand/Left-Hand Driving Customs". Colorado State University. Retrieved 13 December 2016.
- "Right-Hand Traffic Act". Ghanalegal.com. Retrieved 14 May 2014.
- Daily Graphic, Issue 7526, 21 December 1974, page 9
- Phil Bartle. "Studies Among the Akan People of West Africa Community, Society, History, Culture; With Special Focus on the Kwawu by Phil Bartle, PhD". Cec.vcn.bc.ca. Retrieved 14 May 2014.
- "Right-Hand Traffic versus Left-Hand Traffic". The Basement Geographer. Retrieved 22 November 2018.
- "Why Does Japan Drive on the Left". 2pass.co.uk. Retrieved 11 August 2006.
- "Customs Services Department – Frequently Asked Questions". KRA. Retrieved 12 December 2010.
- "Over 20,000 Right Hand Drive Cars Imported in Kyrgyzstan in 2012". The Gazette of Central Asia. Satrapia. 8 May 2013.
- "Photo of All Change. Swop Over Point for the Traffic !". Panoramio. Retrieved 10 June 2012.
- Peter van Ammelrooy. "De Claim links rijden". De Volkskrant (in Dutch). Retrieved 14 May 2014.
- "2.1 "Keeping Left" – Land Transport (Road User) Rule 2004 – New Zealand Legislation". New Zealand Government. Retrieved 28 November 2010.
- "Travel advice by country, Oman". Foreign & Commonwealth Office (fco.gov.uk). Archived from the original on 8 April 2008. Retrieved 8 August 2006.
- Mozambique: memoirs of a revolution, John Paul, Penguin, 1975, page 41
- "Russian Far East is still attached to Japanese cars". Russia behind the headlines. 31 August 2016. Retrieved 12 August 2017.
- The Rising Sun: A History of the All People's Congress Party of Sierra Leone, A.P.C. Secretariat, 1982, page 396
- Sierra Leone Bans Right-Hand Vehicles as Hazards, Voice of America, Nina de Vries, 17 September 2013
- "Road Rules". SACarRental.com. Retrieved 15 February 2014.
- "Driving in South Africa Information". drivesouthafrica.co.za. Retrieved 15 February 2014.
- Passed by the Legislative Yuan (1946). "違警罰法 (Act Governing the Punishment of Police Offences)". Archived from the original on 10 December 2013. Retrieved 14 August 2012.
- Trinidad and Tobago Adventure Guide, Kathleen O'Donnell, Stassi Pefkaros, Hunter Publishing, Inc, 2000, page 53
- Colonial Reports, Annual, Volumes 1480–1499, 1930, page 76
- The Channel Islands War: 1940–1945, Peter King, Hale, 1991, page 31
- El día en que el Río de la Plata dejó de manejar por la izquierda, Autoblog, 25 August 2015
- "RHD/LHD Country Guide". toyota-gib.com. Retrieved 22 September 2017.
- "South Yemen – Postage stamps – 1977". stampworld.com.
|Wikimedia Commons has media related to Right- and left-hand traffic.|
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