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53-594: The Lagos–Ibadan Expressway is a 127.6-kilometre-long (79.3 mi) expressway connecting Ibadan , the capital of Oyo State and Lagos , Nigeria's largest city. It is also the major route to the northern, southern and eastern parts of Nigeria. The expressway is the oldest in Nigeria, commissioned in August 1978 during the Military era, under the administration of Lieutenant-General Olusegun Obasanjo . The expressway

106-549: A fairly recent addition to a complex network of roads. China's first expressway was built in 1988. Until 1993, very few expressways existed. The network is expanding rapidly after 2000. In 2011, 11,000 kilometres (6,800 mi) of expressways were added to the network. The Expressways of Pakistan are a network of multiple-lane, high-speed highways in Pakistan, which are owned, maintained and operated federally by Pakistan's National Highway Authority . They are one class lower than

159-452: A grade-separated junction may be referred to as a grade separation or as an interchange – in contrast with an intersection , at-grade , a diamond crossing or a level crossing , which are not grade-separated. Roads with grade separation generally allow traffic to move freely, with fewer interruptions, and at higher overall speeds; this is why speed limits are typically higher for grade-separated roads. In addition, reducing

212-416: A highway) that they cross. However, grade-separated pedestrian crossings with steps introduce accessibility problems. Some crossings have lifts , but these can be time-consuming to use. Grade-separated roads that permit for higher speed limits can actually reduce safety due to 'weaving' (see below) as well as a perceived sense of safety. The term is most widely applied to describe a road junction in which

265-581: A maximum design speed of more than 60 km/h (37 mph), excluding pedestrian, bicycle, moped or tractor traffic. Oversized vehicles are banned. The construction of transregional Kraftfahrstraßen highways ( Autostraßen ) rank below the standard of German autobahns . With regard to the general German speed limits , on roads with lanes separated by a median or with a minimum of two marked lanes per direction, an advisory speed limit ( Richtgeschwindigkeit ) of 130 km/h (81 mph) applies. At-grade intersections are admissible, regulation at junctions

318-414: A partial grade separation will accomplish more improvement than for a road), and because at-grade railway connections often take up significant space on their own. However, they require significant engineering effort, and are very expensive and time-consuming to construct. Grade-separated pedestrian and cycling routes often require modest space since they do not typically intersect with the facility (such as

371-850: A space that is not accessible to vehicles, the drivers may not drive on the lane opposite to them. In Croatia , the term brza cesta (lit. "fast road") is used to describe a motor vehicle-only road, usually grade-separated , without an emergency lane , with a speed limit of 110 km/h (68 mph), although it can be lowered, usually to 70 or 90 km/h (43 or 56 mph). They range from 2+2 lane dual carriageways with grade-separated intersections and 110 km/h (68 mph) speed limit ( D2 in Osijek ), four or six-lane urban streets with at-grade intersections with traffic lights ( D1 in Karlovac ) or two-lane single carriageways with grade-separated intersections ( D33 in Šibenik ). They are either

424-610: A standalone state road ( D10 ) or a part of one (Southern Osijek bypass, D2 ). Some portions of motorways are expressways since they are either in construction ( A8 between Pazin and Matulji ) or designed as such ( A7 in Rijeka ). As a rule, the expressways are not tolled, however major tunnels on expressways are tolled. Expressways in the Czech Republic ( Czech : Silnice pro motorová vozidla , are defined as dual carriageways with smaller emergency lane. The speed limit

477-461: Is 100 km/h (summertime) and 80 km/h (wintertime). On motorways the speed limits are 120 and 100 km/h respectively. Especially during winter the speed limits can be changed due to weather conditions. A Kraftfahrstrasse ( German for "motor-power road", also colloquially called Schnellstraße , literally "fast road") in Germany is any road with access limited to motor vehicles with

530-594: Is 110 km/h (70 mph). Expressway road signs are white on blue. In Denmark , a 'motortrafikvej' ( Danish for "motor traffic road") is a high-speed highway with a speed limit between 80–90 km/h (50–56 mph). The most common 'motortrafikvej' has two lanes (1+1) or 2+1. There is no grade intersections. The signs for 'motortrafikvej' have white text on blue background. In Finland , highways are separated into three categories: all-access valtatie ("main road"), limited-access moottoriliikennetie ("motor traffic road") and finally moottoritie ("motorway");

583-404: Is a public road, the beginning of which is indicated by the first signboard (F9) and the end by the second sign (F11). An important difference with an autosnelweg is that crossroads as well as traffic lights can be on an autoweg . In Belgium there is no specific speed regulation for an autoweg . Only motor vehicles and their trailers (with the exception of mopeds), agricultural vehicles and

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636-487: Is accessed via cross roads or frontage roads , while minor roads can cross at grade and farms can have direct access. This definition is also used by some states, some of which also restrict freeways only to motor vehicles capable of maintaining a certain speed. Some other states use "controlled access" to mean a higher standard than "limited access", while others reverse the two terms. While Australia 's larger capital cities feature controlled-access highway networks,

689-643: Is between 50–70 km/h (31–43 mph) and in rural and desert areas between 90–110 km/h (56–68 mph). The term Expressway as used in English in Japan refers to both freeway -style highways and narrower, more winding, often undivided Regional High-Standard Highways 地域高規格道路 ( ちいきこうきかくどうろ ) . Both types of expressways have a combined length of 10,021 km (6,227 mi) as of April 2012. Limited-access roads in Malaysia usually, but not always, take

742-419: Is fully grade-separated, i.e. traffic on one road does not have to stop at yield lines or signals on one road, but may have to do so when switching to the other: On roadways with grade-separated interchanges, weaving is a result of placing an exit ramp a short distance after an entry ramp, causing conflicts between traffic attempting to leave the roadway at the next junction and traffic attempting to enter from

795-730: Is known as a flying junction and one which is not a level junction . In 1897, the London and South Western Railway (LSWR) made use of a flying junction at Worting Junction south of Basingstoke to allow traffic on the Salisbury and Southampton routes to converge without conflicting movements; this became known as "Battledown Flyover". Also in Britain, the Southern Railway later made extensive use of flying junctions on other parts of its busy former LSWR main line. Today in Britain,

848-673: Is one of the busiest inter-state routes in Nigeria and handles more than 250,000 PCUs daily and constitutes one of the largest road networks in Africa. It is part of the Federal Roads Maintenance Agency (FERMA) projects, concerned with road improvement and connectivity between the States of Nigeria . The reconstruction of the expressway was flagged off in July 2013 by President Goodluck Ebele Jonathan then president of

901-431: Is reduced to 110 km/h for vehicles under 3.5 tons, and 70 km/h for vehicles over 3.5 tons. In Hungary there are multiple types of dual carriageways. One part is almost identical with motorways, but the driving lanes are narrower. Parameters of a 2+2 lane dual carriageway off-habitat area: Parameters of a 2+2 lane dual carriageway in habitat (town/city) area: There are also semi-motorways with only one side of

954-515: Is usually provided by traffic lights or roundabouts . U-turns and any deliberate stopping are prohibited. Kraftfahrstraßen are out of bounds to pedestrians , except for special crosswalks. Expressways in Hungary are called Autóút (Auto/car road). They are mostly dual carriageways. The main difference between Hungarian motorways and expressways is, that they are more cheaply built with narrower width and often undivided. Maximum speed limit

1007-601: The Federal Republic of Nigeria , to help reduce the travel time of hundreds of thousands of commuters and international air passengers. The contract was awarded to Julius Berger Nigeria and Reynolds Construction Company Limited at a sum of 167 billion Naira, equivalent to $ 838,986,290. Two sections of the expressway will be reconstructed and this includes Section I (Lagos to Sagamu Interchange) and section II (Sagamu Interchange to Ibadan). Limited-access road The first implementation of limited-access roadways in

1060-526: The Great Central Railway , built between 1896 and 1899, was the first fully grade-separated railway of this type in the UK. This also applies to light rail and even to street cars . Attempts have been made to increase the capacity of railways by making tracks cross in a grade-separated manner, as opposed to the traditional use of flat crossings to change tracks. A grade-separated rail interchange

1113-692: The Indian National Highway System on which they are the highest class of road. The National Highways Development Project is underway to add an additional 18,637 km (11,580 mi) of expressways to the network by the year 2023. Expressways in Iran are one class lower than freeways and are used in large urban areas such as Isfahan , Mashhad , or Tehran and between other important cities (Usually two province capitals) in rural and desert areas. The speed limit in Urban areas

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1166-1077: The federal government . Notable examples of limited-access roads are the Federal Highway , Skudai Highway , Gelugor Highway , Kuantan Bypass and Kuching Bypass . Limited-access roads in Singapore are formally known as semi-expressways (in contrast to controlled-access highways which are known as expressways ). While still functioning as high-speed roads, semi-expressways may still have at-grade intersections with traffic lights , and speed limits are not uniform. Grade separation is, however, still typical at major junctions. Five roads have been designated as semi-expressways: Bukit Timah Road , Jurong Island Highway , Nicoll Highway , Outer Ring Road System and West Coast Highway . Motorways in South Korea (자동차 전용 도로, jadongcha jeonyong doro , literally 'motor vehicle-only road') include various grades of highways other than expressways . Contrary to

1219-428: The traffic flow on other transit routes when they cross each other. The composition of such transport axes does not have to be uniform; it can consist of a mixture of roads , footpaths , railways , canals , or airport runways . Bridges (or overpasses , also called flyovers), tunnels (or underpasses ), or a combination of both can be built at a junction to achieve the needed grade separation. In North America,

1272-583: The A4/M5 junction west of Bristol . Weaving can often cause side-on collisions on very fast roads with top speeds of up to 200 kilometres per hour, as well as the problem of blind spots. Where junctions have unusual designs weaving can be a problem other than on the main road. An example of this can be found at Junction 7 of the M6, where traffic joining the roundabout from the M6 Eastbound off-slip must weave with

1325-458: The Eastbound off-slip must leave. Weaving can be alleviated by using collector/distributor roads or braided ramps to separate entering and exiting traffic. In railway construction, grade separation also means the avoidance of level crossings by making any roads or footpaths crossing the line either pass under or over the railway on bridges . This greatly improves safety and is crucial to

1378-546: The M31 Hume Highway between Sydney and Melbourne, are almost all limited-access highways. In spite of this, 'freeway' terminology is used on signage for most regional limited access highways in the state of Victoria . The terms Motorway and Expressway in New Zealand both encompass multi-lane divided freeways as well as narrower 2 to 4-lane undivided expressways with varying degrees of grade separation ;

1431-728: The United States was the Bronx River Parkway in New York , in 1907. The New York State Parkway System was constructed as a network of high-speed roads in and around New York City . The first limited access highway built is thought to be the privately built Long Island Motor Parkway in Long Island , New York. The Southern State Parkway opened in 1927, while the Long Island Motor Parkway

1484-515: The capacity of a road compared to an identical road with at-grade junctions. For instance, it is extremely uncommon to find an at-grade junction on a British motorway ; it is all but impossible on a U.S. Interstate Highway , though a few do exist. If traffic can traverse the junction from any direction without being forced to come to a halt, then the junction is described as fully grade separated or free-flowing . These junctions connect two freeways: These junctions connect two roads, but only one

1537-725: The complexity of traffic movements reduces the risk of accidents . Grade-separated road junctions are typically space-intensive, complicated, and costly, due to the need for large physical structures such as tunnels, ramps, and bridges. Their height can be obtrusive, and this, combined with the large traffic volumes that grade-separated roads attract, tend to make them unpopular to nearby landowners and residents. For these reasons, proposals for new grade-separated roads can receive significant public opposition. Rail-over-rail grade separations take up less space than road grade separations: because shoulders are not needed, there are generally fewer branches and side road connections to accommodate (because

1590-492: The country's motorways and are usually upgraded versions of the national highways. The total length of Pakistan's expressways is 260-kilometre (160 mi) as of November, 2016. Around 770-kilometre (480 mi) of expressways are currently under construction in different parts of country. Most of these expressways will be complete between 2017 and 2020. Expressways in India make up more than 5,579  km (3,467  mi ) of

1643-519: The difference being that in New Zealand a Motorway has certain additional legal traffic restrictions. The Expressway Network of the People's Republic of China is the longest highway system in the world. The network is also known as National Trunk Highway System (NTHS). By the end of 2016, the total length of China's expressway network reached 131,000 kilometers (82,000 mi). Expressways in China are

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1696-571: The direct flow of traffic on one or more of the roads is not disrupted. Instead of a direct connection, traffic must use on and off ramps ( United States , Australia , New Zealand ) or slip roads ( United Kingdom , Ireland ) to access the other roads at the junction. The road which carries on through the junction can also be referred to as grade separated . Typically, large freeways , highways , motorways , or dual carriageways are chosen to be grade separated, through their entire length or for part of it. Grade separation drastically increases

1749-500: The expressway in South Korea, the status of motorway is a measure of traffic control rather than a class of road. For example, Jayu-ro is a segment of national route 77 as well as a motorway. As of June 2011, 1,610 km of highways in total were designated as motorways. (1,052 km national highways, 351 km metropolitan highways, 185 km regional highways and 20 km municipal highways) Like on expressways, motorcycles are not permitted. Sri Lanka has ensured to classify

1802-427: The expressways in reference to the connotation of E grades. As of 2014 , three expressways namely the  E01   Southern Expressway ,  E02   Outer Circular Expressway and the  E03   Colombo – Katunayake Expressway have been created. A tax levying structure is proposed for travelling via the expressways. Speed limits in the range of 80–100 km/h is attested for travelling through

1855-708: The expressways. Up to now two expressways namely the Northern Expressway and the Ruwanpura Expressway are in process to satisfy the needs of public transport. [REDACTED] Expressways in Taiwan may be controlled-access highways similar to National Freeways or limited-access roads. Most have Provincial (as opposed to National) Highway status, although some are built and maintained by cities. All provincial expressways run east–west except for Provincial Highway No. 61 , which runs north–south along

1908-573: The faster speed requires grade separation. Therefore, many high speed lines are elevated, especially in Taiwan and Japan , where population density alongside high speed lines is higher than in France, Italy or Germany. In the United States, a flying junction on the Nickel Plate Road through Cleveland , Ohio , United States was completed in 1913. The most frequent use was later found on

1961-508: The former Pennsylvania Railroad main lines. The lines are included as part of the Northeast Corridor and Keystone Corridor now owned by Amtrak . The most complex of these junctions, near Philadelphia Zoo , handles railway traffic for Amtrak, SEPTA , New Jersey Transit , Norfolk Southern , CSX Transportation , and Conrail . In what is known as "area 1520" , which includes the former Soviet Union and other regions using

2014-451: The lack of one or more required features. In absence of specific regulation signs, a type-C road is accessible by all vehicles and pedestrians, even if it has separate carriageways and no cross-traffic. Grade separation In civil engineering (more specifically highway engineering ), grade separation is a method of aligning a junction of two or more surface transport axes at different heights (grades) so that they will not disrupt

2067-469: The latter two are marked with green signage, while valtatie signage is blue. While most of the network is all-access road, 779 km (484 mi) of it is motorway, and 124 km (77 mi) is limited-access road. The access is limited to motor vehicles faster than 50 km/h, thus excluding pedestrian, bicycle, moped or tractor traffic; furthermore, towing is not allowed. Limited-access roads are generally similar to motorways, but do not fulfill all

2120-458: The motorway built. After the missing lanes are built, they will become standard motorways. A High-quality dual carriageway (HQDC) in Ireland is normally completed to a motorway standard, including no right-turns, but with no motorway restrictions. These are common on the final stretches of motorways nearing a major city, generally in order to enable use of bus stops and city bus services on

2173-401: The name highway ( Malay : lebuhraya – this is also the name for expressways ). Highways normally have a lower speed limit than expressways (but still higher than the rest of the local road network), and permit at-grade intersections and junctions to residential roads and shopfronts, although grade separation is still typical. Highways are normally toll-free and are owned and operated by

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2226-431: The particular stretch of road. Speed limits are normally 100 km/h compared to 120 km/h on motorways In Italy there are: Type B highway (or strada extraurbana principale ), commonly but unofficially known as superstrada , is a divided highway with at least two lanes for each direction, paved shoulder on the right, no cross-traffic and no at-grade intersections. Access restrictions on such highways are exactly

2279-544: The previous junction. This situation is most prevalent either where the junction designer has placed the on-slip to the road before the off-slip at a junction (for example, the cloverleaf interchange ), or in urban areas with many close-spaced junctions. The ring road of Coventry , England , is a notorious example, as are parts of the southern M25, the London orbital motorway , the M6/M5 junction north-west of Birmingham , and

2332-557: The safe operation of high-speed lines. The construction of new level crossings is generally not permitted, especially for high speed railway lines and level crossings are increasingly less common due to the increase of both road and rail traffic. Efforts to remove level crossings are done in the UK by Network Rail and in Melbourne as part of the Level Crossing Removal Project . The London Extension of

2385-747: The same gauge, the most complicated grade-separation railpoint is found at Liubotyn in Ukraine . Footbridges and subways (called underpasses in North America as well as in the United Kingdom when referring to roads) may be employed to allow pedestrians and cyclists to cross busy or fast streets. They are often used over and under motorways since at grade pedestrian crossings are generally not permitted. Same can be said for railways. Though introduced to Central Park in New York City in

2438-581: The same of Italian motorways ( autostrade ), as well as signage at the beginning and the end of the highway (with the only difference being the background color, blue instead of green). Speed limit on type-B road is 110 km/h (68 mph). Type C highway (or strada extraurbana secondaria ), a single carriageway with at least one lane for each direction and shoulders. It may have at-grade, at-level crossings with railways , roundabouts and traffic lights . This category contains also dual carriageways that can not be classified as type-B highways because of

2491-491: The smaller metropolitan areas mostly rely on limited-access highways for high-speed local traffic. In South Australia the terms "expressway" and "freeway" can be synonymous. The Southern and Northern Expressways are both controlled-access highways. However, perhaps confusingly, the Port River Expressway is a limited-access highway. Dual carriageways that connect capital cities and regional centres, such as

2544-430: The technical requirements, such as several lanes in one direction or separation of opposite directions. Limited-access roads are usually built because the local population density is too low to justify a motorway. Often space has been left during construction for an eventual upgrade to a motorway. Limited-access roads also function as feeder routes for motorways. The general speed limit on main roads and limited-access roads

2597-400: The tightly grouped nest of flying junctions to the north of Clapham Junction railway station —although technically a combination of many junctions—handle more than 4,000 trains per day (about one train every 15 seconds). Virtually all major railway lines no longer cross (forming an 'X' shape ) at flat level (although many diverge - i.e. 'Y' shape). On almost all high-speed railway lines,

2650-407: The towing of fairground vehicles, as well as four-wheelers (without passenger compartment), are allowed to drive on an autoweg . An autoweg can consist of two or more lanes. The driving directions can be separated by a roadmarking, or by a central reservation. If a public road ( autosnelweg , autoweg , weg ) consists of two or more lanes that are clearly separated from each other by a roadside or

2703-548: The traffic already on the roundabout wishing to use the M6 Westbound on-slip. This is as a result of the slip roads on the west side of the junction connecting to the roundabout on the inside of the eastern arc rather than the outside of the western arc as is normal. The two slip-roads are connected by a single lane on the inside of the roundabout, which traffic wishing to use the Westbound on-slip must join, and traffic from

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2756-421: The west coast. Some provincial expressway routes are still under construction. In Austria the speed limit on a Schnellstraße is 100–130 km/h (62–81 mph). Schnellstraßen are very similar to Austrian Autobahnen (freeways/motorways); the chief difference is that they are more cheaply built with smaller curve radius, often undivided and have fewer bridges and tunnels. In Belgium an autoweg

2809-599: Was closed in 1937 and replaced by the Northern State Parkway (opened in 1931) and the contiguous Grand Central Parkway (opened in 1936). In the United States , the national Manual on Uniform Traffic Control Devices (MUTCD) uses "full control of access" only for freeways . Expressways are defined as having "partial control of access" (or semi-controlled access ). This means that major roads typically use interchanges and commercial development

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