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94-453: Construction began in 1879 of a narrow-gauge railway to Gyzylarbat in connection with the Russian conquest of Transcaspia under General Mikhail Skobelev . It was rapidly altered to the standard Russian gauge of 5 ft ( 1,524 mm ), and construction through to Ashkabad and Merv (modern Mary ) was completed under General Michael Nicolaivitch Annenkoff in 1886. Originally

188-698: A 3 ft 6 in ( 1,067 mm ) gauge, whereas Vietnam, Malaysia and Thailand have metre-gauge railways . Narrow-gauge trams, particularly metre-gauge, are common in Europe. Non-industrial, narrow-gauge mountain railways are (or were) common in the Rocky Mountains of the United States and the Pacific Cordillera of Canada, Mexico, Switzerland, Bulgaria, the former Yugoslavia , Greece, and Costa Rica. A narrow-gauge railway

282-422: A 25-year cooperation agreement that will strengthen the relations between the two countries and would include "political, strategic and economic" components. Iran-China relations dates back to at least 200 BC and possibly earlier. Iran is one of the few countries in the world that has a good relationship with both North and South Korea . Iran is a member of dozens of international organizations, including

376-629: A branch built in the Soviet period connects northwestward to Urganch and on to Kazakhstan and Russia. The main line continues from Turkmenabat through Bukhoro (where a branch line built in 1910 leads to Termez and Dushanbe ) and then carries on to Samarqand . At Sirdaryo , where it crosses the Syr Darya river, a branch runs east into the fertile Fergana Valley . From there, the railway continues to Tashkent . There another northwest bound line runs to Kazakhstan, which branches at Arys forming

470-480: A ceremonial body without any real power. The political system is based on the country's constitution . Iran ranked 154th in the 2022 The Economist Democracy Index . Juan José Linz wrote in 2000 that "the Iranian regime combines the ideological bent of totalitarianism with the limited pluralism of authoritarianism ". The President is head of government and the second highest-ranking authority, after

564-590: A close economic and military alliance, and are subject to heavy sanctions by Western nations. Iran is the only country in Western Asia that has been invited to join the CSTO , the Russia-based international treaty organization that parallels NATO . Relations between Iran and China are strong economically; they have developed a friendly, economic and strategic relationship. In 2021, Iran and China signed

658-425: A curve with standard-gauge rail ( 1435 mm ) can allow speed up to 145 km/h (90 mph), the same curve with narrow-gauge rail ( 1067mm ) can only allow speed up to 130 km/h (81 mph). In Japan and Queensland, recent permanent-way improvements have allowed trains on 3 ft 6 in ( 1,067 mm ) gauge tracks to exceed 160 km/h (99 mph). Queensland Rail 's Electric Tilt Train ,

752-455: A design speed of 137 km/h (85 mph). Curve radius is also important for high speeds: narrow-gauge railways allow sharper curves, but these limit a vehicle's safe speed. Many narrow gauges, from 15 in ( 381 mm ) gauge to 4 ft 8 in ( 1,422 mm ) gauge, are in present or former use. They fall into several broad categories: 4 ft 6 in ( 1,372 mm ) track gauge (also known as Scotch gauge)

846-542: A distinct political and cultural entity. The Muslim conquest of Persia (632–654) ended the Sasanian Empire and marked a turning point in Iranian history, leading to the Islamization of Iran from the eighth to tenth centuries and the decline of Zoroastrianism . However, the achievements of prior Persian civilizations were absorbed into the new Islamic polity. Iran suffered invasions by nomadic tribes during

940-474: A heavy-duty narrow-gauge line is Brazil's EFVM . 1,000 mm ( 3 ft  3 + 3 ⁄ 8  in ) gauge, it has over-100-pound rail (100 lb/yd or 49.6 kg/m) and a loading gauge almost as large as US non-excess-height lines. The line has a number of 4,000-horsepower (3,000 kW) locomotives and 200-plus-car trains. Narrow gauge's reduced stability means that its trains cannot run at speeds as high as on broader gauges. For example, if

1034-698: A leading world power, though by the 19th century, it had lost significant territory through conflicts with the Russian Empire . The early 20th century saw the Persian Constitutional Revolution and the establishment of the Pahlavi dynasty . Attempts by Mohammad Mosaddegh to nationalize the oil industry led to an Anglo-American coup in 1953 . After the Iranian Revolution , the monarchy was overthrown in 1979 and

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1128-503: A mine in Bohemia with a railway of about 2 ft ( 610 mm ) gauge. During the 16th century, railways were primarily restricted to hand-pushed, narrow-gauge lines in mines throughout Europe. In the 17th century, mine railways were extended to provide transportation above ground. These lines were industrial , connecting mines with nearby transportation points (usually canals or other waterways). These railways were usually built to

1222-503: A moderate position internationally. In 1997, Rafsanjani was succeeded by moderate reformist Mohammad Khatami , whose government advocated freedom of expression , constructive diplomatic relations with Asia and the European Union , and an economic policy that supported a free market and foreign investment. The 2005 presidential election brought conservative populist and nationalist candidate Mahmoud Ahmadinejad to power. He

1316-825: A number of large 3 ft ( 914 mm ) railroad systems in North America; notable examples include the Denver & Rio Grande and Rio Grande Southern in Colorado; the Texas and St. Louis Railway in Texas, Arkansas and Missouri; and, the South Pacific Coast , White Pass and Yukon Route and West Side Lumber Co of California. 3 ft was also a common track gauge in South America, Ireland and on

1410-572: A range of industrial railways running on 500 mm ( 19 + 3 ⁄ 4  in ) and 400 mm ( 15 + 3 ⁄ 4  in ) tracks, most commonly in restricted environments such as underground mine railways, parks and farms, in France. Several 18 in ( 457 mm ) gauge railways were built in Britain to serve ammunition depots and other military facilities, particularly during World War I . Iran Iran , officially

1504-471: A strong response from Iran, based on their historical and cultural background. Iran has full-control over the islands. Kish island , as a free trade zone , is touted as a consumer's paradise, with malls, shopping centres, tourist attractions, and luxury hotels. Qeshm is the largest island in Iran, and a UNESCO Global Geopark since 2016. Its salt cave, Namakdan, is the largest in the world, and one of

1598-418: Is a major regional power , due to its large reserves of fossil fuels , including the world's second largest natural gas supply , third largest proven oil reserves , its geopolitically significant location, military capabilities , cultural hegemony , regional influence, and role as the world's focal point of Shia Islam . The Iranian economy is the world's 23rd-largest by PPP . Iran is a founding member of

1692-491: Is a track gauge of 1,000 mm ( 3 ft  3 + 3 ⁄ 8  in ). It has about 95,000 km (59,000 mi) of track. According to Italian law, track gauges in Italy were defined from the centre of each rail rather than the inside edges of the rails. This gauge, measured 950 mm ( 3 ft  1 + 3 ⁄ 8  in ) between the edges of the rails, is known as Italian metre gauge . There were

1786-452: Is accountable only to the Rahbar. The Court's rulings are final and cannot be appealed. The Assembly of Experts, which meets for one week annually, comprises 86 "virtuous and learned" clerics elected by adult suffrage for 8-year terms. Iran is subdivided into thirty-one provinces ( Persian : استان ostân ), each governed from a local centre, usually the largest local city, which is called

1880-478: Is four times that of Europe's. There are over 200 protected areas to preserve biodiversity and wildlife, with over 30 being national parks . Iran's living fauna includes 34 bat species, Indian grey mongoose , small Indian mongoose , golden jackal , Indian wolf , foxes , striped hyena , leopard , Eurasian lynx , brown bear and Asian black bear . Ungulate species include wild boar , urial , Armenian mouflon , red deer , and goitered gazelle . One of

1974-559: Is in a seismically active area. On average, an earthquake of magnitude seven on the Richter scale occurs once every ten years. Most earthquakes are shallow-focus and can be very devastating, such as the 2003 Bam earthquake . Iran consists of the Iranian Plateau . It is one of the world's most mountainous countries; its landscape is dominated by rugged mountain ranges that separate basins or plateaus . The populous west part

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2068-488: Is one where the distance between the inside edges of the rails is less than 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Historically, the term was sometimes used to refer to what are now standard-gauge railways , to distinguish them from broad-gauge railways , but this use no longer applies. The earliest recorded railway appears in Georgius Agricola 's 1556 De re metallica , which shows

2162-543: Is the sixth-largest country entirely in Asia and one of the world's most mountainous countries. Officially an Islamic republic , Iran has a Muslim-majority population . The country is divided into five regions with 31 provinces . Tehran is the nation's capital , largest city and financial center . A cradle of civilization , Iran has been inhabited since the Lower Palaeolithic . The large part of Iran

2256-551: Is the highest judge of the Supreme Court of Iran . The Chief Justice nominates candidates to serve as minister of justice, and the President selects one. The Chief Justice can serve for two five-year terms. The Special Clerical Court handles crimes allegedly committed by clerics , although it has taken on cases involving laypeople . The Special Clerical Court functions independently of the regular judicial framework and

2350-635: Is the most mountainous, with ranges such as the Caucasus , Zagros , and Alborz , the last containing Mount Damavand , Iran's highest point, at 5,610 m (18,406 ft), which is the highest volcano in Asia. Iran's mountains have impacted its politics and economics for centuries. The north part is covered by the lush lowland Caspian Hyrcanian forests , near the southern shores of the Caspian Sea. The east part consists mostly of desert basins, such as

2444-542: The Oxford English Dictionary as / ɪ ˈ r ɑː n / and / ɪ ˈ r æ n / , while American English dictionaries provide pronunciations which map to / ɪ ˈ r ɑː n , - ˈ r æ n , aɪ ˈ r æ n / , or / ɪ ˈ r æ n , ɪ ˈ r ɑː n , aɪ ˈ r æ n / . The Cambridge Dictionary lists / ɪ ˈ r ɑː n / as the British pronunciation and / ɪ ˈ r æ n / as

2538-489: The Army , the head of Supreme National Security Council , and has the power to declare a state of emergency after passage by the parliament. The President is responsible for the implementation of the constitution, and for the exercise of executive powers in implementing the decrees and general policies as outlined by the Rahbar, except for matters directly related to the Rahbar, who has the final say. The President functions as

2632-620: The Caucasus to the Russian Empire following the Russo-Persian Wars . Iran remained a monarchy until the 1979 Iranian Revolution , when it officially became an Islamic republic on 1 April 1979. Since then, Iran has experienced significant political, social, and economic changes. The establishment of the Islamic Republic of Iran led to the restructuring of its political system, with Ayatollah Khomeini as

2726-625: The G-15 , G-24 , G-77 , IAEA , IBRD , IDA , NAM , IDB , IFC , ILO , IMF , IMO , Interpol , OIC , OPEC , WHO , and the UN , and currently has observer status at the WTO . The military is organized under a unified structure, the Islamic Republic of Iran Armed Forces , comprising the Islamic Republic of Iran Army , which includes the Ground Forces , Air Defence Force , Air Force , and Navy ;

2820-639: The Islamic Golden Age . A series of Iranian Muslim dynasties ended Arab rule, revived the Persian language and ruled the country until the Seljuk and Mongol conquests of the 11th to 14th centuries. In the 16th century, the native Safavids re-established a unified Iranian state with Twelver Shi'ism as the official religion . During the Afsharid Empire in the 18th century, Iran was

2914-756: The Islamic Republic of Iran ( IRI ), also known as Persia , is a country in West Asia . It borders Turkey to the northwest and Iraq to the west, Azerbaijan , Armenia , the Caspian Sea , and Turkmenistan to the north, Afghanistan to the east, Pakistan to the southeast, the Gulf of Oman and the Persian Gulf to the south. With a multi-ethnic population of almost 90 million in an area of 1,648,195 km (636,372 sq mi), Iran ranks 17th globally in both geographic size and population . It

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3008-766: The Islamic Revolutionary Guard Corps , which consists of the Ground Forces , Aerospace Force , Navy , Quds Force , and Basij ; and the Law Enforcement Command (Faraja), which serves an analogous function to a gendarme . While the IRIAF protects the country's sovereignty in a traditional capacity, the IRGC is mandated to ensure the integrity of the Republic, against foreign interference, coups, and internal riots. Since 1925 , it

3102-1021: The Isle of Man . 900 mm was a common gauge in Europe. Swedish three-foot-gauge railways ( 891 mm or 2 ft  11 + 3 ⁄ 32  in ) are unique to that country and were once common all over the country. Today the only 891 mm line that remains apart from heritage railways is Roslagsbanan , a commuter line that connects Stockholm to its northeastern suburbs. A few railways and tramways were built to 2 ft 9 in ( 838 mm ) gauge, including Nankai Main Line (later converted to 3 ft 6 in or 1,067 mm ), Ocean Pier Railway at Atlantic City , Seaton Tramway ( converted from 2 ft ) and Waiorongomai Tramway . 800 mm ( 2 ft  7 + 1 ⁄ 2  in ) gauge railways are commonly used for rack railways . Imperial 2 ft 6 in ( 762 mm ) gauge railways were generally constructed in

3196-775: The Kassites , Mannaeans , and Gutians . Georg Wilhelm Friedrich Hegel called the Persians the "first Historical People". The Iranian Empire began in the Iron Age with the rise of the Medes , who unified Iran as a nation and empire in 625 BC. The Achaemenid Empire (550–330 BC), founded by Cyrus the Great , was the largest empire the world had seen, spanning from the Balkans to North Africa and Central Asia . They were succeeded by

3290-763: The Kavir Desert , which is the country's largest desert, and the Lut Desert , as well as salt lakes . The Lut Desert is the hottest recorded spot on the Earth's surface, with 70.7 °C recorded in 2005. The only large plains are found along the coast of the Caspian and at the north end of the Persian Gulf, where the country borders the mouth of the Arvand river . Smaller, discontinuous plains are found along

3384-623: The Late Middle Ages and early modern period , negatively impacting the region. Iran was reunified as an independent state in 1501 by the Safavid dynasty , which established Shia Islam as the empire's official religion, marking another turning point in the history of Islam . Iran functioned again as a leading world power, especially in rivalry with the Ottoman Empire . In the 19th century, Iran lost significant territories in

3478-478: The Republic of Azerbaijan (611 km or 380 mi); to the north by the Caspian Sea ; to the northeast by Turkmenistan (992 km or 616 mi); to the east by Afghanistan (936 km or 582 mi) and Pakistan (909 km or 565 mi); to the south by the Persian Gulf and the Gulf of Oman ; and to the west by Iraq (1,458 km or 906 mi) and Turkey (499 km or 310 mi). Iran

3572-696: The Russian Civil War . Troops of the British Indian Army participated in some of the battles along the railway line. Tashkent was an important bastion for the Red Army . During the Soviet period and beyond, the railway was administered from Tashkent . The railway starts at the eastern shore of the Caspian Sea at Turkmenbashi (Krasnovodsk) and heads southeast, along the edge of the Karakum Desert . The important junction on

3666-650: The Seleucid , Parthian , and Sasanian Empires , who governed Iran for almost 1,000 years, making Iran a leading power once again. Persia's arch-rival during this time was the Roman Empire and its successor, the Byzantine Empire . Iran endured invasions by the Macedonians , Arabs , Turks , and Mongols . Despite these invasions, Iran continually reasserted its national identity and developed as

3760-560: The South Caucasus . However, they have shared common interests, such as the issue of Kurdish separatism and the Qatar diplomatic crisis . Iran has a close and strong relationship with Tajikistan . Iran has deep economic relations and alliance with Iraq , Lebanon and Syria, with Syria often described as Iran's "closest ally". Russia is a key trading partner, especially in regard to its excess oil reserves. Both share

3854-591: The Tashkent Soviet on 2 March 1917. They decreed that the administration of the railway should be transferred away from Ashkhabad and sent Commissar Frolov to that city, a move that proved unpopular. In turn, railway workers along the western end of the railway initiated a break away from Bolshevik -oriented Tashkent, setting up the Ashkhabad Executive Committee on 14 July 1918. Both railway and workers played an important role in

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3948-1064: The Turkestan-Siberia Railway to Novosibirsk . Narrow-gauge railway A narrow-gauge railway ( narrow-gauge railroad in the US) is a railway with a track gauge narrower than 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) standard gauge . Most narrow-gauge railways are between 600 mm ( 1 ft  11 + 5 ⁄ 8  in ) and 1,067 mm ( 3 ft 6 in ). Since narrow-gauge railways are usually built with tighter curves , smaller structure gauges , and lighter rails ; they can be less costly to build, equip, and operate than standard- or broad-gauge railways (particularly in mountainous or difficult terrain). Lower-cost narrow-gauge railways are often used in mountainous terrain, where engineering savings can be substantial. Lower-cost narrow-gauge railways are often built to serve industries as well as sparsely populated communities where

4042-666: The United Nations , OIC , OPEC , and ECO as well as a current member of the NAM , SCO , and BRICS . Iran is home to 28 UNESCO World Heritage Sites , the 10th highest in the world, and ranks 5th in Intangible Cultural Heritage , or human treasures. The term Iran ' the land of the Aryans ' derives from Middle Persian Ērān , first attested in a 3rd-century inscription at Naqsh-e Rostam , with

4136-418: The parliament . The Rahbar is the commander-in-chief of the Armed Forces , controls military intelligence and security operations, and has sole power to declare war or peace. The heads of the judiciary, state radio and television networks, commanders of the police and military, and the members of the Guardian Council are all appointed by the Rahbar. The Assembly of Experts is responsible for electing

4230-806: The 2nd-most powerful person in Iran, was assassinated by the US , heightening tensions between them . Iran retaliated against US airbases in Iraq , the largest ballistic missile attack ever on Americans; 110 sustained brain injuries . Hardliner Ebrahim Raisi ran for president again in 2021 , succeeding Hassan Rouhani . During Raisi's term, Iran intensified uranium enrichment , hindered international inspections, joined SCO and BRICS, supported Russia in its invasion of Ukraine and restored diplomatic relations with Saudi Arabia. In April 2024, Israel's airstrike on an Iranian consulate , killed an IRGC commander. Iran retaliated with UAVs , cruise and ballistic missiles ; 9 hit Israel. Western and Jordanian military helped Israel down some Iranian drones. It

4324-428: The 500mm gauge tracks of their mine railway ; these locomotives were made by the Deutz Gas Engine Company ( Gasmotorenfabrik Deutz ), now Deutz AG . Another early use of internal combustion was to power a narrow-gauge locomotive was in 1902. F. C. Blake built a 7 hp petrol locomotive for the Richmond Main Sewerage Board sewage plant at Mortlake . This 2 ft 9 in ( 838 mm ) gauge locomotive

4418-399: The American pronunciation. Voice of America 's pronunciation guide provides / ɪ ˈ r ɑː n / . Iran is home to one of the world's oldest continuous major civilizations, with historical and urban settlements dating back to 4000 BC. The western part of the Iranian plateau participated in the traditional ancient Near East with Elam (3200–539 BC), and later with other peoples such as

4512-473: The Guardian Council is not needed. The Leader can revert the decisions of the Guardian Council. The constitution gives the council three mandates: veto power over legislation passed by the parliament , supervision of elections and approving or disqualifying candidates seeking to run in local, parliamentary, presidential, or Assembly of Experts elections. The council can nullify a law based on two accounts: being against Sharia (Islamic law), or being against

4606-444: The Guardian Council, and serves as an advisory body to the Supreme Leader, making it one of the most powerful governing bodies in Iran. The Parliament has 207 constituencies, including the 5 reserved seats for religious minorities. The remaining 202 are territorial, each covering one or more of Iran's counties . Iran uses a form of Sharia law as its legal system, with elements of European Civil law . The Supreme Leader appoints

4700-515: The Islamic Republic of Iran was established by Ruhollah Khomeini , who became the country's first Supreme Leader . In 1980, Iraq invaded Iran , sparking the eight-year-long Iran–Iraq War , which ended in stalemate. Iran is officially governed as a unitary Islamic republic with a presidential system , with ultimate authority vested in a Supreme Leader. The government is authoritarian and has attracted widespread criticism for its significant violations of human rights and civil liberties. Iran

4794-407: The Persian Gulf and Gulf of Oman have mild winters, and very humid and hot summers. The annual precipitation ranges from 135 to 355 mm (5.3 to 14.0 in). More than one-tenth of the country is forested . About 120 million hectares of forests and fields are government-owned for national exploitation. Iran's forests can be divided into five vegetation regions: Hyrcanian region which forms

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4888-655: The Philippines demonstrate that if track is built to a heavy-duty standard, performance almost as good as a standard-gauge line is possible. Two-hundred-car trains operate on the Sishen–Saldanha railway line in South Africa, and high-speed Tilt Trains run in Queensland. In South Africa and New Zealand, the loading gauge is similar to the restricted British loading gauge; in New Zealand, some British Rail Mark 2 carriages have been rebuilt with new bogies for use by Tranz Scenic (Wellington-Palmerston North service), Tranz Metro (Wellington-Masterton service), and Auckland One Rail (Auckland suburban services). Another example of

4982-419: The Rahbar, and has the power to dismiss him on the basis of qualifications and popular esteem. To date, the Assembly of Experts has not challenged any of the Rahbar's decisions nor attempted to dismiss him. The previous head of the judicial system, Sadeq Larijani , appointed by the Rahbar, said that it is illegal for the Assembly of Experts to supervise the Rahbar. Many believe the Assembly of Experts has become

5076-450: The Revolution or Supreme Leadership Authority, is the head of state and responsible for supervision of policy. The president has limited power compared to the Rahbar. Key ministers are selected with the Rahbar's agreement and they have the ultimate say on foreign policy. The Rahbar is directly involved in ministerial appointments for Defence, Intelligence and Foreign Affairs, as well as other top ministries after submission of candidates from

5170-468: The Supreme Leader. Iran's foreign relations have been shaped by the Iran–Iraq War (1980–1988), ongoing tensions with the United States, and its nuclear program, which has been a point of contention in international diplomacy. In 1989, Akbar Rafsanjani concentrated on a pro-business policy of rebuilding the economy without breaking with the ideology of the revolution. He supported a free market domestically, favoring privatization of state industries and

5264-402: The Supreme Leader. The President is elected by universal suffrage for 4 years. Before elections , nominees to become a presidential candidate must be approved by the Guardian Council . The Council's members are chosen by the Leader, with the Leader having the power to dismiss the president. The President can only be re-elected for one term. The president is the deputy commander-in-chief of

5358-456: The accompanying Parthian inscription using Aryān , in reference to the Iranians . Ērān and Aryān are oblique plural forms of gentilic nouns ēr- (Middle Persian) and ary- (Parthian), deriving from Proto-Iranian language *arya- (meaning ' Aryan ', i.e. of the Iranians), recognised as a derivative of Proto-Indo-European language *ar-yo- , meaning ' one who assembles (skilfully) ' . According to Iranian mythology ,

5452-409: The area. These rising trade figures were used by Governor-General Nikolai Rozenbakh to argue for the extension to Tashkent, while the merchant N. I. Reshetnikov offered private funds for the same purpose. The railway was the most important means of communication in the area, and workers on the railway became key activists during the Russian revolution . It was thirty-five railway workers who founded

5546-574: The capital (Persian: مرکز , markaz ) of that province. The provincial authority is headed by a governor-general ( استاندار ostândâr ), who is appointed by the Minister of the Interior subject to approval of the cabinet . Iran maintains diplomatic relations with 165 countries , but not the United States and Israel —a state which Iran derecognised in 1979. Iran has an adversarial relationship with Saudi Arabia due to different political and ideologies. Iran and Turkey have been involved in modern proxy conflicts such as in Syria , Libya , and

5640-813: The coal industry. Some sugar cane lines in Cuba were 2 ft  3 + 1 ⁄ 2  in ( 699 mm ). 2 ft ( 610 mm ) gauge railways were generally constructed in the former British colonies. The U.S. had a number of railways of that gauge , including several in the state of Maine such as the Wiscasset, Waterville and Farmington Railway . 1 ft  11 + 3 ⁄ 4  in ( 603 mm ), 600 mm ( 1 ft  11 + 5 ⁄ 8  in ) and 1 ft  11 + 1 ⁄ 2  in ( 597 mm ) were used in Europe. Gauges below 1 ft  11 + 1 ⁄ 2  in ( 597 mm ) were rare. Arthur Percival Heywood developed 15 in ( 381 mm ) gauge estate railways in Britain and Decauville produced

5734-432: The constitution. The Supreme National Security Council (SNSC) is at the top of the foreign policy decisions process. The council was formed during the 1989 Iranian constitutional referendum for the protection and support of national interests, the revolution, territorial integrity and national sovereignty. It is mandated by Article 176 of the Constitution to be presided over by the President . The Leader selects

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5828-445: The country, which was succeeded by the Sasanian Empire in the third century AD. Ancient Iran saw some of the earliest developments of writing, agriculture, urbanisation, religion and central government. Muslims conquered the region in the seventh century AD, leading to Iran's Islamization . The blossoming literature , philosophy , mathematics , medicine , astronomy and art became major elements for Iranian civilization during

5922-440: The entire country as Persia , until 1935, when Reza Shah requested the international community to use its native and original name, Iran ; Iranians called their nation Iran since at least 1000 BC. Today, both Iran and Persia are used culturally, while Iran remains mandatory in official use. The Persian pronunciation of Iran is [ʔiːˈɾɒːn] . Commonwealth English pronunciations of Iran are listed in

6016-473: The executive of affairs such as signing treaties and other international agreements, and administering national planning, budget, and state employment affairs, all as approved by the Rahbar. The President appoints ministers, subject to the approval of the Parliament, and the Rahbar, who can dismiss or reinstate any minister. The President supervises the Council of Ministers , coordinates government decisions, and selects government policies to be placed before

6110-427: The fastest train in Australia and the fastest 3 ft 6 in ( 1,067 mm ) gauge train in the world, set a record of 210 km/h (130 mph). The speed record for 3 ft 6 in ( 1,067 mm ) narrow-gauge rail is 245 km/h (152 mph), set in South Africa in 1978. A special 2 ft ( 610 mm ) gauge railcar was built for the Otavi Mining and Railway Company with

6204-422: The foothills of the Kopet Dagh mountains, and passing through Tejen . At Tejen, a modern railway link branches off, heading to the Iranian border at Serakhs , and thence to Mashhad in Iran . From Tejen, the Trans-Caspian heads northeast, through Mary ( Merv ), where a branch line built in the 1890s leads to the Afghan border at Gushgy , and the main line carries on to Turkmenabat (Chärjew). From there,

6298-422: The former British colonies . 760 mm Bosnian gauge and 750 mm railways are predominantly found in Russia and Eastern Europe. Gauges such as 2 ft 3 in ( 686 mm ), 2 ft 4 in ( 711 mm ) and 2 ft  4 + 1 ⁄ 2  in ( 724 mm ) were used in parts of the UK, particularly for railways in Wales and the borders, with some industrial use in

6392-400: The green belt of the north side of the country; the Turan region, which are mainly scattered in the center of Iran; Zagros region , which mainly contains oak forests in the west; the Persian Gulf region , which is scattered in the southern coastal belt; the Arasbarani region , which contains rare and unique species. More than 8,200 plant species are grown. The land covered by natural flora

6486-453: The head of the Supreme Court and chief public prosecutor. There are several types of courts, including public courts that deal with civil and criminal cases, and revolutionary courts which deal with certain offences, such as crimes against national security . The decisions of the revolutionary courts are final and cannot be appealed. The Chief Justice is the head of the judicial system and responsible for its administration and supervision. He

6580-445: The legislature. Eight Vice Presidents serve under the President, as well as a cabinet of 22 ministers, all appointed by the president. Presidential and parliamentary candidates must be approved by the 12-member Guardian Council (all members of which are appointed by the Leader) or the Leader, before running to ensure their allegiance. The Leader rarely does the vetting, but has the power to do so, in which case additional approval of

6674-408: The line began from Uzun-Ada on the Caspian Sea , but the terminus was later shifted north to the harbour at Krasnovodsk . The Railway reached Samarkand via Bukhara in 1888, where it halted for ten years until extended to Tashkent and Andijan in 1898. The permanent bridge over the Oxus (Amu-Darya) was not completed until 1901, and until then trains ran over a rickety wooden construction that

6768-655: The military or used for wildlife protection, and entry is prohibited or requires a permit. Iran took control of Bumusa , and the Greater and Lesser Tunbs in 1971, in the Strait of Hormuz between the Persian Gulf and Gulf of Oman. Despite the islands being small and having little natural resources or population, they are highly valuable for their strategic location. Although the United Arab Emirates claims sovereignty, it has consistently been met with

6862-441: The most famous animals is the critically endangered Asiatic cheetah , which survives only in Iran. Iran lost all its Asiatic lions and the extinct Caspian tigers by the early 20th century. Domestic ungulates are represented by sheep , goat , cattle , horse , water buffalo , donkey and camel . Bird species like pheasant , partridge , stork , eagles and falcons are native. The Supreme Leader , "Rahbar", Leader of

6956-744: The name comes from Iraj , a legendary king. Iran was referred to as Persia by the West , due to Greek historians who referred to all of Iran as Persís , meaning 'the land of the Persians '. Persia is the Fars province in southwest Iran, the 4th largest province, also known as Pârs . The Persian Fârs (فارس), derived from the earlier form Pârs (پارس), which is in turn derived from Pârsâ ( Old Persian : 𐎱𐎠𐎼𐎿). Due to Fars' historical importance, Persia originated from this territory through Greek in around 550 BC, and Westerners referred to

7050-623: The national budget. All parliamentary candidates and legislation from the assembly must be approved by the Guardian Council . The Guardian Council can and has dismissed elected members of the parliament. The parliament has no legal status without the Guardian Council, and the Council holds absolute veto power over legislation. The Expediency Discernment Council has the authority to mediate disputes between Parliament and

7144-529: The president. Regional policy is directly controlled by the Rahbar, with the Ministry of Foreign Affairs' task limited to protocol and ceremonial occasions. Ambassadors to Arab countries, for example, are chosen by the Quds Force , which directly reports to the Rahbar. The Rahbar can order laws to be amended. Setad was estimated at $ 95 billion in 2013 by Reuters, accounts of which are secret even to

7238-706: The remaining coast of the Persian Gulf, the Strait of Hormuz , and Gulf of Oman. Iranian islands are mainly located in the Persian Gulf. Iran has 102 islands in Urmia Lake , 427 in Aras River , several in Anzali Lagoon , Ashurade Island in the Caspian Sea , Sheytan Island in the Oman Sea and other inland islands. Iran has an uninhabited island at the far end of the Gulf of Oman , near Pakistan. A few islands can be visited by tourists. Most are owned by

7332-645: The route and locomotive repair depot is located in Bereket city (formerly Gazandjyk) some 340 km (211 mi) to the east. Also at this point the Trans-Caspian railway intersects the newly constructed North-South Transnational Railway which connects Russia, Kazakhstan, Turkmenistan, Iran and ends at Persian Gulf . After Bereket, the route runs parallel to the Karakum Canal . It passes through Ashgabat (Ashkhabad) and continues southeast, hugging

7426-550: The same narrow gauge as the mine railways from which they developed. The world's first steam locomotive , built in 1802 by Richard Trevithick for the Coalbrookdale Company, ran on a 3 ft ( 914 mm ) plateway . The first commercially successful steam locomotive was Matthew Murray 's Salamanca built in 1812 for the 4 ft 1 in ( 1,245 mm ) Middleton Railway in Leeds . Salamanca

7520-672: The secretary of the Supreme Council, and the decisions of the council are effective after the confirmation by the Leader. The SNSC formulates nuclear policy, and would become effective if they are confirmed by the Leader. The legislature , known as the Islamic Consultative Assembly (ICA), Iranian Parliament or "Majles", is a unicameral body comprising 290 members elected for four-years. It drafts legislation, ratifies international treaties , and approves

7614-475: The traffic potential would not justify the cost of a standard- or broad-gauge line. Narrow-gauge railways have specialised use in mines and other environments where a small structure gauge necessitates a small loading gauge . In some countries, narrow gauge is the standard: Japan, Indonesia, Taiwan, New Zealand, South Africa, and the Australian states of Queensland , Western Australia and Tasmania have

7708-573: The west part. The UN Resident Coordinator for Iran, has said that " Water scarcity poses the most severe human security challenge in Iran today". To the west, settlements in the Zagros basin experience lower temperatures, severe winters with freezing average daily temperatures and heavy snowfall. The east and central basins are arid, with less than 200 mm (7.9 in) of rain and have occasional deserts. Average summer temperatures rarely exceed 38 °C (100.4 °F). The southern coastal plains of

7802-451: The world's longest caves. Iran's climate is diverse, ranging from arid and semi-arid , to subtropical along the Caspian coast and northern forests. On the north edge of the country, temperatures rarely fall below freezing and the area remains humid. Summer temperatures rarely exceed 29 °C (84.2 °F). Annual precipitation is 680 mm (26.8 in) in the east part of the plain and more than 1,700 mm (66.9 in) in

7896-676: The world; 19th-century mountain logging operations often used narrow-gauge railways to transport logs from mill to market. Significant sugarcane railways still operate in Cuba, Fiji, Java, the Philippines, and Queensland, and narrow-gauge railway equipment remains in common use for building tunnels. In 1897, a manganese mine in the Lahn valley in Germany was using two benzine -fueled locomotives with single cylinder internal combustion engines on

7990-525: Was adopted by early 19th-century railways, primarily in the Lanarkshire area of Scotland. 4 ft  6 + 1 ⁄ 2  in ( 1,384 mm ) lines were also constructed, and both were eventually converted to standard gauge. 1,067 mm ( 3 ft 6 in ) between the inside of the rail heads, its name and classification vary worldwide and it has about 112,000 kilometres (70,000 mi) of track. As its name implies, metre gauge

8084-611: Was also the first rack-and-pinion locomotive. During the 1820s and 1830s, a number of industrial narrow-gauge railways in the United Kingdom used steam locomotives. In 1842, the first narrow-gauge steam locomotive outside the UK was built for the 1,100 mm ( 3 ft  7 + 5 ⁄ 16  in )-gauge Antwerp-Ghent Railway in Belgium. The first use of steam locomotives on a public, passenger-carrying narrow-gauge railway

8178-511: Was elected to office. Iran has an area of 1,648,195 km (636,372 sq mi). It is the sixth-largest country entirely in Asia and the second-largest in West Asia. It lies between latitudes 24° and 40° N , and longitudes 44° and 64° E . It is bordered to the northwest by Armenia (35 km or 22 mi), the Azeri exclave of Nakhchivan (179 km or 111 mi), and

8272-550: Was first unified as a political entity by the Medes under Cyaxares in the seventh century BC, and reached its territorial height in the sixth century BC, when Cyrus the Great founded the Achaemenid Empire , one of the largest in ancient history . Alexander the Great conquered the empire in the fourth century BC. An Iranian rebellion established the Parthian Empire in the third century BC and liberated

8366-560: Was in 1865, when the Ffestiniog Railway introduced passenger service after receiving its first locomotives two years earlier. Many narrow-gauge railways were part of industrial enterprises and served primarily as industrial railways , rather than general carriers. Common uses for these industrial narrow-gauge railways included mining, logging, construction, tunnelling, quarrying, and conveying agricultural products. Extensive narrow-gauge networks were constructed in many parts of

8460-648: Was known for his hardline views, nuclearisation, and hostility towards Israel , Saudi Arabia , the UK , the US and other states. He was the first president to be summoned by the parliament to answer questions regarding his presidency. In 2013, centrist and reformist Hassan Rouhani was elected president. In domestic policy, he encouraged personal freedom, free access to information, and improved women's rights. He improved Iran's diplomatic relations through exchanging conciliatory letters. The Joint Comprehensive Plan of Action (JCPOA)

8554-668: Was often damaged by floods. As early as 1905, there was a train ferry across the Caspian Sea from Krasnovodsk to Baku in Azerbaijan . The Tashkent Railway connecting the Transcaspian Military Railway with the network of other Russian and European railways was completed in 1906. The railway permitted a massive increase in the amount of cotton exported from the region. This increased from 873,092 pudy in 1888 to 3,588,025 in 1893. Also sugar, kerosene , wood, iron and construction material were imported into

8648-649: Was probably the third petrol-engined locomotive built. Extensive narrow-gauge rail systems served the front-line trenches of both sides in World War I . They were a short-lived military application, and after the war the surplus equipment created a small boom in European narrow-gauge railway building. The heavy-duty 3 ft 6 in ( 1,067 mm ) narrow-gauge railways in Australia (Queensland), New Zealand, South Africa, Japan, Taiwan, Indonesia and

8742-658: Was reached in Vienna in 2015, between Iran, the P5+1 ( UN Security Council + Germany) and the EU. The negotiations centered around ending the economic sanctions in exchange for Iran's restriction in producing enriched uranium . In 2018, however, the US under Trump Administration withdrew from the deal and new sanctions were imposed. This nulled the economic provisions, left the agreement in jeopardy, and brought Iran to nuclear threshold status . In 2020, IRGC general, Qasem Soleimani ,

8836-642: Was the largest drone strike in history, biggest missile attack in Iranian history, its first ever direct attack on Israel and the first time since 1991 , Israel was directly attacked by a state force. This occurred during heightened tensions amid the Israeli invasion of the Gaza Strip . In May 2024, President Raisi was killed in a helicopter crash , and Iran held a presidential election in June, when reformist and former Minister of Health , Masoud Pezeshkian ,

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