126-694: The M20 is a motorway in Kent , England. It follows on from the A20 at Swanley , meeting the M25 , and continuing on to Folkestone , providing a link to the Channel Tunnel and the ports at Dover . It is 50.6 miles (81.4 km) long. Although not signposted in England, this road is part of the European route E15 . It is also used as a holding area for goods traffic when traffic across
252-649: A dual highway ) in 1932 between Cologne and Bonn . It then rapidly constructed the first nationwide system of such roads. The first North American freeways (known as parkways) opened in the New York City area in the 1920s. Britain, heavily influenced by the railways, did not build its first motorway , the Preston By-pass ( M6 ), until 1958. Most technologically advanced nations feature an extensive network of freeways or motorways to provide high-capacity urban travel, or high-speed rural travel, or both. Many have
378-466: A median separates the opposite directions of traffic. This strip may be as simple as a grassy area, or may include a crash barrier such as a " Jersey barrier " or an "Ontario Tall Wall" to prevent head-on collisions . On some freeways, the two carriageways are built on different alignments; this may be done to make use of available corridors in a mountainous area or to provide narrower corridors through dense urban areas . Control of access relates to
504-531: A 25 kilometres (16 mi) stretch of light steel netting called the Dover Barrage , which it was hoped would ensnare submerged submarines. After initial success, the Germans learned how to pass through the barrage, aided by the unreliability of British mines. On 31 January 1917, the Germans resumed unrestricted submarine warfare leading to dire Admiralty predictions that submarines would defeat Britain by November,
630-557: A class of highways with somewhat less isolation from other traffic. In countries following the Vienna convention , the motorway qualification implies that walking and parking are forbidden. A fully controlled-access highway provides an unhindered flow of traffic, with no traffic signals , intersections or property access . They are free of any at-grade crossings with other roads, railways, or pedestrian paths, which are instead carried by overpasses and underpasses . Entrances and exits to
756-694: A cloverleaf and trumpet interchange when it opened in 1937, and until the Second World War , boasted the longest illuminated stretch of roadway built. A decade later, the first section of Highway 401 was opened, based on earlier designs. It has since gone on to become the busiest highway in the world. The word freeway was first used in February 1930 by Edward M. Bassett . Bassett argued that roads should be classified into three basic types: highways, parkways , and freeways. In Bassett's zoning and property law -based system, abutting property owners have
882-620: A freeway, specialized pedestrian footbridges or tunnels may also be provided. These structures enable pedestrians and cyclists to cross the freeway at that point without a detour to the nearest road crossing. Access to freeways is typically provided only at grade-separated interchanges , though lower-standard right-in/right-out (left-in/left-out in countries that drive on the left) access can be used for direct connections to side roads. In many cases, sophisticated interchanges allow for smooth, uninterrupted transitions between intersecting freeways and busy arterial roads . However, sometimes it
1008-524: A junction spans several hundred metres and start and end points are available, both are cited. Controlled-access highway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway , motorway , and expressway . Other similar terms include throughway or thruway and parkway . Some of these may be limited-access highways , although this term can also refer to
1134-434: A larger number of guide signs than other roads, and the signs themselves are physically larger. Guide signs are often mounted on overpasses or overhead gantries so that drivers can see where each lane goes. Exit numbers are commonly derived from the exit's distance in miles or kilometers from the start of the freeway. In some areas, there are public rest areas or service areas on freeways, as well as emergency phones on
1260-499: A legal status which limits the types of vehicles that can use a highway, as well as a road design that limits the points at which they can access it. Major arterial roads will often have partial access control , meaning that side roads will intersect the main road at grade, instead of using interchanges, but driveways may not connect directly to the main road, and drivers must use intersecting roads to access adjacent land. At arterial junctions with relatively quiet side roads, traffic
1386-504: A lorry park until the ferries and/or Channel Tunnel are fully running again. Operation Brock was the replacement for Stack, to be used in the event of no-deal Brexit . In July 2020, the government announced that it had bought a site beside junction 10A to build the Sevington customs clearance facility and lorry park . Data from driver location signs are used to provide distance in kilometres and carriageway identifier information. Where
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#17328584458771512-518: A milepost system but does not use milepost markers. In Europe and some other countries, motorways typically have similar characteristics such as: Two-lane freeways , often undivided, are sometimes built when traffic volumes are low or right-of-way is limited; they may be designed for easy conversion to one side of a four-lane freeway. (For example, most of the Bert T. Combs Mountain Parkway in eastern Kentucky
1638-447: A motorway is understood as a public road with dual carriageways and at least two lanes each way. All entrances and exits are signposted and all interchanges are grade separated. Central barrier or median present throughout the road. No crossing is permitted, while stopping is permitted only in an emergency. Restricted access to motor vehicles, prohibited to pedestrians, animals, pedal cycles, mopeds, agricultural vehicles. The minimum speed
1764-772: A national-level or even international-level (e.g. European E route ) system of route numbering . There are several international standards that give some definitions of words such as motorways, but there is no formal definition of the English language words such as freeway , motorway , and expressway , or of the equivalent words in other languages such as autoroute , Autobahn , autostrada , autocesta, autoput , that are accepted worldwide—in most cases these words are defined by local statute or design standards or regional international treaties. Descriptions that are widely used include: One green or blue symbol (like [REDACTED] ) appears at motorway entry in countries that follow
1890-589: A number of patterns. The actual pattern is determined by a number of factors including local topology, traffic density, land cost, building costs, type of road, etc. In some jurisdictions feeder/distributor lanes are common, especially for cloverleaf interchanges ; in others, such as the United Kingdom, where the roundabout interchange is common, feeder/distributor lanes are seldom seen. Motorways in Europe typically differ between exits and junctions. An exit leads out of
2016-594: A park and where intersecting streets crossed over bridges. The Southern State Parkway opened in 1927, while the Long Island Motor Parkway was closed in 1937 and replaced by the Northern State Parkway (opened 1931) and the contiguous Grand Central Parkway (opened 1936). In Germany, construction of the Bonn-Cologne Autobahn began in 1929 and was opened in 1932 by Konrad Adenauer , then
2142-457: A private venture, was the world's first limited-access roadway. It included many modern features, including banked turns , guard rails and reinforced concrete tarmac . Traffic could turn left between the parkway and connectors, crossing oncoming traffic, so it was not a controlled-access highway (or "freeway" as later defined by the federal government's Manual on Uniform Traffic Control Devices ). Modern controlled-access highways originated in
2268-509: A protected World Heritage Site coastline. The ship had been damaged and was en route to Portland Harbour . The English Channel, despite being a busy shipping lane, remains in part a haven for wildlife. Atlantic oceanic species are more common in the westernmost parts of the channel, particularly to the west of Start Point, Devon , but can sometimes be found further east towards Dorset and the Isle of Wight. Seal sightings are becoming more common along
2394-609: A reduction in deaths in a range from 20% to 50% on those sections. Speed, in Europe, is considered to be one of the main contributory factors to collisions. Some countries, such as France and Switzerland, have achieved a death reduction by a better monitoring of speed. Tools used for monitoring speed might be an increase in traffic density; improved speed enforcement and stricter regulation leading to driver license withdrawal; safety cameras; penalty point; and higher fines. Some other countries use automatic time-over-distance cameras (also known as section controls ) to manage speed. Fatigue
2520-538: A separate roadway or altogether eliminates it. In some parts of the world, notably parts of the US , frontage roads form an integral part of the freeway system. These parallel surface roads provide a transition between high-speed "through" traffic and local traffic. Frequent slip-ramps provide access between the freeway and the frontage road, which in turn provides direct access to local roads and businesses. Except on some two-lane freeways (and very rarely on wider freeways),
2646-510: A similar system of express and local lanes for a maximum width of 21 lanes on a 2-mile (3.2 km) segment between Interstate 805 and California State Route 56 . In Mississauga , Ontario, Highway 401 uses collector-express lanes for a total of 18 lanes through its intersection with Highway 403 / Highway 410 and Highway 427 . These wide freeways may use separate collector and express lanes to separate through traffic from local traffic, or special high-occupancy vehicle lanes , either as
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#17328584458772772-411: A special restriction on the innermost lane or a separate roadway, to encourage carpooling . These HOV lanes , or roadways open to all traffic, can be reversible lanes , providing more capacity in the direction of heavy traffic, and reversing direction before traffic switches. Sometimes a collector/distributor road , a shorter version of a local lane, shifts weaving between closely spaced interchanges to
2898-593: Is considered as a risk factor more specific to monotonous roads such as motorways, although such data are not monitored/recorded in many countries. According to Vinci Autoroutes , one third of accidents in French motorways are due to sleepy driving. English Channel The English Channel , also known as the Channel , is an arm of the Atlantic Ocean that separates Southern England from northern France . It links to
3024-728: Is controlled mainly by two-way stop signs which do not impose significant interruptions on traffic using the main highway. Roundabouts are often used at busier intersections in Europe because they help minimize interruptions in flow, while traffic signals that create greater interference with traffic are still preferred in North America. There may be occasional interchanges with other major arterial roads. Examples include US 23 between SR 15 's eastern terminus and Delaware, Ohio , along with SR 15 between its eastern terminus and I-75 , US 30 , SR 29 / US 33 , and US 35 in western and central Ohio. This type of road
3150-676: Is crossed by the Ashford and HS1 railway lines before becoming the Ashford bypass. Travelling past Brabourne Lees it is once again joined by HS1 and the East Stour . Just north of Saltwood it reaches the Channel Tunnel terminal and is crossed by HS1 for the last time. The final section runs along the northern suburbs of Folkestone. The M20 was, in common with many United Kingdom motorways, opened in stages: Junctions 5 to 7 opened in 1960. One end
3276-639: Is necessary to exit onto a surface road to transfer from one freeway to another. One example in the United States (notorious for the resulting congestion) is the connection from Interstate 70 to the Pennsylvania Turnpike ( Interstate 70 and Interstate 76 ) through the town of Breezewood, Pennsylvania . Speed limits are generally higher on freeways and are occasionally nonexistent (as on much of Germany's Autobahn network). Because higher speeds reduce decision time, freeways are usually equipped with
3402-450: Is not lower than 50 km/h [31 mph] and the maximum speed is not higher than 130 km/h [81 mph] (except Germany where no speed limit is defined). Motorways are designed to carry heavy traffic at high speed with the lowest possible number of accidents. They are also designed to collect long-distance traffic from other roads, so that conflicts between long-distance traffic and local traffic are avoided. According to
3528-431: Is provided with separate carriageways for the two directions of traffic). Principal arterials may cross through urban areas, serving suburban movements. The traffic is characterized by high speeds and full or partial access control (interchanges or junctions controlled by traffic lights). Other roads leading to a principal arterial are connected to it through side collector roads. In this view, CARE's definition stands that
3654-407: Is sometimes called an expressway . Freeways are usually limited to motor vehicles of a minimum power or weight; signs may prohibit cyclists , pedestrians and equestrians and impose a minimum speed. It is possible for non-motorized traffic to use facilities within the same right-of-way, such as sidewalks constructed along freeway-standard bridges and multi-use paths next to freeways such as
3780-480: Is specially sign-posted as a motorway and is reserved for specific categories of road motor vehicles." Urban motorways are also included in this definition. However, the respective national definitions and the type of roads covered may present slight differences in different EU countries. The first version of modern controlled-access highways evolved during the first half of the 20th century. The Long Island Motor Parkway on Long Island , New York , opened in 1908 as
3906-545: Is the result of several changes, including infrastructure safety and road user behavior (speed or seat belt use), while other matters such as vehicle safety and mobility patterns have an impact that has not been quantified. Motorways are the safest roads by design. While accounting for more than one quarter of all kilometres driven, they contributed only 8% of the total number of European road deaths in 2006. Germany's Federal Highway Research Institute provided International Road Traffic and Accident Database (IRTAD) statistics for
M20 motorway - Misplaced Pages Continue
4032-408: Is two lanes, but work has begun to make all of it four-lane.) These are often called Super two roads. Several such roads are infamous for a high rate of lethal crashes; an outcome because they were designed for short sight distances (sufficient for freeways without oncoming traffic, but insufficient for the years in service as two-lane road with oncoming traffic). An example of such a "Highway to Hell"
4158-456: The Battle of Britain featured German air attacks on Channel shipping and ports; despite these early successes against shipping the Germans did not win the air supremacy necessary for Operation Sealion , the projected cross-Channel invasion. The Channel subsequently became the stage for an intensive coastal war, featuring submarines, minesweepers , and Fast Attack Craft . The narrow waters of
4284-611: The Dartford Crossing (the furthest downstream public crossing of the River Thames ) or where it was not economic to build a motorway alongside the existing road such as the former Cumberland Gap . The A1 is a good example of piece-wise upgrading to motorway standard—as of January 2013, the 639-kilometre-long (397 mi) route had five stretches of motorway (designated as A1(M)), reducing to four stretches in March 2018 with completion of
4410-678: The English Channel is disrupted, such as Operation Stack and Operation Brock . The road starts at its junction with the M25 motorway and A20 road just east of Swanley , then continues south east across the River Darent , north of Farningham through the North Downs , past West Kingsdown and Wrotham to meet the M26 . It then strikes east, running north of Addington . When it reaches junction 4 it passes south of New Hythe and runs parallel to
4536-633: The Glorious Revolution of 1688, while the concentration of excellent harbours in the Western Channel on Britain's south coast made possible the largest amphibious invasion in history, the Normandy Landings in 1944. Channel naval battles include the Battle of the Downs (1639), Battle of Dover (1652), the Battle of Portland (1653) and the Battle of La Hougue (1692). In more peaceful times,
4662-580: The Low Countries . The North Sea reaches much greater depths east of northern Britain. The Channel descends briefly to 180 m (590 ft) in the submerged valley of Hurd's Deep , 48 km (30 mi) west-northwest of Guernsey . There are several major islands in the Channel, the most notable being the Isle of Wight off the English coast, and the Channel Islands , British Crown Dependencies off
4788-554: The Medway Valley railway line before crossing it close to junction 5. This next section is the Maidstone bypass . The High Speed 1 (HS1) railway line then runs parallel to the motorway as it continues to the north of Bearsted , crosses the Swanley to Ashford (via Maidstone East) line then out into the countryside alongside Leeds Castle . Proceeding south of Lenham and Charing it
4914-603: The Medway cost £200,000. The section opened on 3 December 1960. Coldharbour Lane was widened to 33 feet (10 m), with a roundabout on the A20, with a terminus of the A20(M) 0.5 miles (0.80 km) north along Coldharbour Lane (junction 5). It was the south of England's first motorway. These sections of the M20 were known as the 'Maidstone Bypass'. This road was then numbered as the A20(M) as it bypassed
5040-570: The Neolithic front in southern Europe to the Mesolithic peoples of northern Europe." The Ferriby Boats , Hanson Log Boats and the later Dover Bronze Age Boat could carry a substantial cross-Channel cargo. Diodorus Siculus and Pliny both suggest trade between the rebel Celtic tribes of Armorica and Iron Age Britain flourished. In 55 BC Julius Caesar invaded, claiming that the Britons had aided
5166-487: The Norman Conquest beginning with the Battle of Hastings , while retaining the fiefdom of Normandy for himself and his descendants. In 1204, during the reign of King John , mainland Normandy was taken from England by France under Philip II , while insular Normandy (the Channel Islands ) remained under English control. In 1259, Henry III of England recognised the legality of French possession of mainland Normandy under
M20 motorway - Misplaced Pages Continue
5292-800: The North Sea to the Western Atlantic via the Strait of Dover is of geologically recent origin, having formed late in the Pleistocene period. The English Channel first developed as an arm of the Atlantic Ocean during the Pliocene period (5.3-2.6 million years ago) as a result of differential tectonic uplift along pre-existing tectonic weaknesses during the Oligocene and Miocene periods. During this early period,
5418-837: The Suncoast Trail along the Suncoast Parkway in Florida . In some US jurisdictions, especially where freeways replace existing roads, non-motorized access on freeways is permitted. Different states of the United States have different laws. Cycling on freeways in Arizona may be prohibited only where there is an alternative route judged equal or better for cycling. Wyoming , the second least densely populated state, allows cycling on all freeways. Oregon allows bicycles except on specific urban freeways in Portland and Medford . In countries such as
5544-730: The Treaty of Paris . His successors, however, often fought to regain control of mainland Normandy. With the rise of William the Conqueror , the North Sea and Channel began to lose some of their importance. The new order oriented most of England and Scandinavia's trade south, toward the Mediterranean and the Orient. Although the British surrendered claims to mainland Normandy and other French possessions in 1801,
5670-484: The Treaty of Paris of 1259 , the surrender of French possessions in 1801, and the belief that the rights of succession to that title are subject to Salic Law which excludes inheritance through female heirs. French Normandy was occupied by English forces during the Hundred Years' War in 1346–1360 and again in 1415–1450. From the reign of Elizabeth I , English foreign policy concentrated on preventing invasion across
5796-531: The United Kingdom new motorways require an Act of Parliament to ensure restricted right of way. Since upgrading an existing road (the "King's Highway") to a full motorway will result in extinguishing the right of access of certain groups such as pedestrians, cyclists and slow-moving traffic, many controlled access roads are not full motorways. In some cases motorways are linked by short stretches of road where alternative rights of way are not practicable such as
5922-424: The United Kingdom , do not distinguish between the two, but others make a distinction; for example, Germany uses the words Kreuz ("cross") or Dreieck ("triangle") for the former and Ausfahrt ("exit") for the latter. In all cases one road crosses the other via a bridge or a tunnel, as opposed to an at-grade crossing . The inter-connecting roads, or slip-roads , which link the two roads, can follow any one of
6048-631: The Veneti against him the previous year. He was more successful in 54 BC , but Britain was not fully established as part of the Roman Empire until Aulus Plautius 's 43 AD invasion . A brisk and regular trade began between ports in Roman Gaul and those in Britain. This traffic continued until the end of Roman rule in Britain in 410 AD, after which the early Anglo-Saxons left less clear historical records. In
6174-490: The shoulder at regular intervals. In the United States, mileposts usually start at the southern or westernmost point on the freeway (either its terminus or the state line). California , Ohio and Nevada use postmile systems in which the markers indicate mileage through the state's individual counties. However, Nevada and Ohio also use the standard milepost system concurrently with their respective postmile systems. California numbers its exits off its freeways according to
6300-610: The Ärmelkanal in German, or a direct borrowing , such as Canal de la Mancha in Spanish. The International Hydrographic Organization defines the limits of the English Channel as: The Strait of Dover (French: Pas de Calais ), at the Channel's eastern end, is its narrowest point, while its widest point lies between Lyme Bay and the Gulf of Saint Malo , near its midpoint. Well on
6426-497: The A1(M) through North Yorkshire . The most frequent way freeways are laid out is by building them from the ground up after obstructions such as forestry or buildings are cleared away. Sometimes they deplete farmland, but other methods have been developed for economic, social and even environmental reasons. Full freeways are sometimes made by converting at-grade expressways or by replacing at-grade intersections with overpasses; however, in
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#17328584458776552-649: The A2070 at Ashford in Kent, east of junction 10, to support the development of South Ashford which has been identified as a growth area in the South East. In May 2012, it was announced that the scheme would be postponed for the short-term future. Planning recommenced in 2016. Work started on building the scheme in January 2018, with works planned to complete in May 2020. The coast-facing sliproads at
6678-548: The A229 with a temporary terminus on the A2011. Junctions 7 to 8 opened in 1961 from the A229 to Coldharbour Lane. It was 1.5 miles (2.4 km), to take 15 months, planned for October 1960. The contract of £822,928 in March 1959 was given to Sir Robert McAlpine. Piles were constructed by West's Piling & Construction, of Harmondsworth . Work was started on Monday 13 April 1959 by Harold Watkinson near Cobtree Manor. The bridge across
6804-460: The Atlantic. The flooding destroyed the ridge that connected Britain to continental Europe , although a land connection across the southern North Sea would have existed intermittently at later times when periods of glaciation resulted in lowering of sea levels. During interglacial periods (when sea levels were high) between the initial flooding 450,000 years ago until around 180,000 years ago,
6930-524: The Channel by ensuring no major European power controlled the potential Dutch and Flemish invasion ports. Her climb to the pre-eminent sea power of the world began in 1588 as the attempted invasion of the Spanish Armada was defeated by the combination of outstanding naval tactics by the English and the Dutch under command of Charles Howard, 1st Earl of Nottingham with Sir Francis Drake second in command, and
7056-522: The Channel did not connect to the North Sea, with Britain and Ireland remaining part of continental Europe , linked by an unbroken Weald–Artois anticline , a ridge running between the Dover and Calais regions. During Pleistocene glacial periods this ridge acted as a natural dam holding back a large freshwater pro-glacial lake in the Doggerland region, now submerged under the North Sea . During this period,
7182-455: The Channel for several weeks, but was thwarted following the British naval victory at the Battle of Quiberon Bay in 1759 and was unsuccessful (The last French landing on English soil being in 1690 with a raid on Teignmouth, although the last French raid on British soil was a raid on Fishguard, Wales in 1797). Another significant challenge to British domination of the seas came during the Napoleonic Wars . The Battle of Trafalgar took place off
7308-503: The Channel served as a link joining shared cultures and political structures, particularly the huge Angevin Empire from 1135 to 1217. For nearly a thousand years, the Channel also provided a link between the Modern Celtic regions and languages of Cornwall and Brittany . Brittany was founded by Britons who fled Cornwall and Devon after Anglo-Saxon encroachment. In Brittany, there is a region known as " Cornouaille " (Cornwall) in French and "Kernev" in Breton . In ancient times there
7434-416: The Channel would still have been separated from the North Sea by a landbridge to the north of the Strait of Dover (the Strait of Dover at this time formed part of a estuary fed by the Thames and Scheldt ), restricting interchange of marine fauna between the Channel and the North Sea (except perhaps by occasional overtopping). During the Last Interglacial/Eemian (115–130,000 years ago) the connection between
7560-460: The English Channel, with both Grey Seal and Harbour Seal recorded frequently. The Channel is thought to have prevented Neanderthals from colonising Britain during the Last Interglacial/Eemian, though they returned to Britain during the Last Glacial Period when sea levels were lower. The Channel has in historic times been both an easy entry for seafaring people and a key natural defence, halting invading armies while in conjunction with control of
7686-436: The Highways Agency having declared that the northern part of the bridge was structurally intact. However this section of the motorway was again closed on the weekend of 3 and 4 September 2016 for the demolition and clearance of the northern bridge element. A replacement pedestrian and cycle bridge was opened in March 2021 at a cost of around £1.5 million. The Highways Agency proposed a new M20 junction 10a and link road to
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#17328584458777812-406: The Isle of Wight and the mainland. The Celtic Sea is to the west of the Channel. The Channel acts as a funnel that amplifies the tidal range from less than a metre at sea in eastern places to more than 6 metres in the Channel Islands , the west coast of the Cotentin Peninsula and the north coast of Brittany in monthly spring tides . The time difference of about six hours between high water at
7938-413: The M1 had started. It was one of three main motorway projects started in 1958. The section was intended to open on 27 March 1960, but was late. On Wednesday 1 June 1960, 5 miles (8.0 km) was opened at Forstal (A229) by Sir Leslie Doubleday, chairman of Kent County Council. Maidstone already had a bypass – the A2011, which largely followed the A20(M) bypass. There was a short section of the A20(M) west of
8064-400: The North Sea allowing Britain to blockade the continent. The most significant failed invasion threats came when the Dutch and Belgian ports were held by a major continental power, e.g. from the Spanish Armada in 1588, Napoleon during the Napoleonic Wars , and Nazi Germany during World War II . Successful invasions include the Roman conquest of Britain , the Norman Conquest in 1066 and
8190-404: The North Sea and almost all of the British Isles were covered by ice. The lake was fed by meltwater from the Baltic and from the Caledonian and Scandinavian ice sheets that joined to the north, blocking its exit. The sea level was about 120 m (390 ft) lower than it is today. Then, between 450,000 and 180,000 years ago, at least two catastrophic glacial lake outburst floods breached
8316-417: The North Sea and the English Channel was fully open as it is today, resulting in Britain being an island during this interval, before lowered sea levels reconnected it to the continent during the Last Glacial Period . From the end of the Last Glacial Period, to the beginning of the Holocene rising sea levels again resulted in the unimpeded connection between the North Sea and the English Channel resuming due to
8442-409: The US, any at-grade intersection that ends a freeway often remains an at-grade intersection. Often, when there is a two-lane undivided freeway or expressway, it is converted by constructing a parallel twin corridor, and leaving a median between the two travel directions. The median-side travel lane of the old two-way corridor becomes a passing lane. Other techniques involve building a new carriageway on
8568-417: The United States, allow for limited exceptions: some movable bridges , for instance the Interstate Bridge on Interstate 5 between Oregon and Washington , do require drivers to stop for ship traffic. The crossing of freeways by other routes is typically achieved with grade separation either in the form of underpasses or overpasses . In addition to sidewalks (pavements) attached to roads that cross
8694-531: The Vienna Convention. Exits are marked with another symbol: [REDACTED] . The definitions of "motorway" from the OECD and PIARC are almost identical. In the European Union , for statistical and safety purposes, some distinction might be made between motorway and expressway . For instance a principal arterial might be considered as: Roads serving long distance and mainly interurban movements. Includes motorways (urban or rural) and expressways (road which does not serve properties bordering on it and which
8820-420: The Weald–Artois anticline. These contributed to creating some of the deepest parts of the channel such as Hurd's Deep . The first flood of 450,000 years ago would have lasted for several months, releasing as much as one million cubic metres of water per second. The flood started with large but localised waterfalls over the ridge, which excavated depressions now known as the Fosses Dangeard . The flow eroded
8946-419: The area. The modern Welsh is often given as Môr Udd (the Lord's or Prince's Sea); however, this name originally described both the Channel and the North Sea combined. Anglo-Saxon texts make reference to the sea as Sūð-sǣ (South Sea), but this term fell out of favour, as later English authors followed the same conventions as their Latin and Norman contemporaries. One English name that did persist
9072-658: The beginning of the Viking Age . For the next 250 years the Scandinavian raiders of Norway, Sweden, and Denmark dominated the North Sea, raiding monasteries, homes, and towns along the coast and along the rivers that ran inland. According to the Anglo-Saxon Chronicle they began to settle in Britain in 851. They continued to settle in the British Isles and the continent until around 1050, with some raids recorded along
9198-783: The bridge. The Queen Elizabeth II Bridge / Dartford tunnel at London Orbital is an example of this. London Orbital or the M25 is a motorway surrounding London , but at the last River Thames crossing before its mouth, motorway rules do not apply. (At this crossing the London Orbital is labeled A282 instead.) A few of the more common types of junction are shown below: There are many differences between countries in their geography, economy, traffic growth, highway system size, degree of urbanization and motorization, etc.; all of which need to be taken into consideration when comparisons are made. According to some EU papers, safety progress on motorways
9324-404: The bypass is still visible as the bridge was not reconstructed when the motorway was constructed. This section of motorway has no hard shoulder indicating the smaller width of the old bypass. This left the motorway in two sections, with the 14-mile (23 km) gap running via the A20 – this was referred to locally as 'The Missing Link'. The level of traffic was not considered necessary to complete
9450-505: The centre of the Straits of Dover and into the English Channel. It left streamlined islands, longitudinal erosional grooves, and other features characteristic of catastrophic megaflood events, still present on the sea floor and now revealed by high-resolution sonar. Through the scoured channel passed a river, the Channel River , which drained the combined Rhine and Thames westwards to
9576-645: The channel coast of England, including at Wareham, Portland, near Weymouth and along the river Teign in Devon. The fiefdom of Normandy was created for the Viking leader Rollo (also known as Robert of Normandy). Rollo had besieged Paris but in 911 entered vassalage to the king of the West Franks Charles the Simple through the Treaty of St.-Claire-sur-Epte . In exchange for his homage and fealty , Rollo legally gained
9702-555: The coast of France. The coastline, particularly on the French shore, is deeply indented, with several small islands close to the coastline, including Chausey and Mont-Saint-Michel . The Cotentin Peninsula on the French coast juts out into the Channel, with the wide Bay of the Seine (French: Baie de Seine ) to its east. On the English side there is a small parallel strait , the Solent , between
9828-480: The coast of Spain against a combined French and Spanish fleet and was won by Admiral Horatio Nelson , ending Napoleon 's plans for a cross-Channel invasion and securing British dominance of the seas for over a century. The exceptional strategic importance of the Channel as a tool for blockading was recognised by the First Sea Lord Admiral Fisher in the years before World War I . "Five keys lock up
9954-492: The common European definition, a motorway is defined as "a road, specially designed and built for motor traffic, which does not serve properties bordering on it, and which: (a) is provided, except at special points or temporarily, with separate carriageways for the two directions of traffic, separated from each other, either by a dividing strip not intended for traffic, or exceptionally by other means; (b) does not cross at level with any road, railway or tramway track, or footpath; (c)
10080-456: The continental shelf of Europe, covering an area of some 75,000 square kilometres (22,000 square nautical miles; 29,000 square miles). The Channel aided the United Kingdom in becoming a naval superpower, serving as a natural defence to halt attempted invasions, such as in the Napoleonic Wars and in the Second World War . The northern, English coast of the Channel is more populous than
10206-540: The continental shelf, it has an average depth of about 120 m (390 ft) at its widest; yet averages about 45 m (148 ft) between Dover and Calais , its notable sandbank hazard being Goodwin Sands . Eastwards from there the adjoining North Sea reduces to about 26 m (85 ft) across the Broad Fourteens (14 fathoms) where it lies over the southern cusp of the former land bridge between East Anglia and
10332-458: The description suggests the name had recently been adopted. In the sixteenth century, Dutch maps referred to the sea as the Engelse Kanaal (English Channel) and by the 1590s, William Shakespeare used the word Channel in his history plays of Henry VI , suggesting that by that time, the name was popularly understood by English people. By the eighteenth century, the name English Channel
10458-517: The early 1920s in response to the rapidly increasing use of the automobile , the demand for faster movement between cities and as a consequence of improvements in paving processes, techniques and materials. These original high-speed roads were referred to as " dual highways " and have been modernized and are still in use today. Italy was the first country in the world to build controlled-access highways reserved for fast traffic and for motor vehicles only. The Autostrada dei Laghi ("Lakes Motorway"),
10584-528: The eastern and western limits of the Channel is indicative of the tidal range being amplified further by resonance . Amphidromic points are the Bay of Biscay and varying more in precise location in the far south of the North Sea, meaning both those associated eastern coasts repel the tides effectively, leaving the Strait of Dover as every six hours the natural bottleneck short of its consequent gravity-induced repulsion of
10710-462: The end of the war and the project was abandoned. The naval blockade in the Channel and North Sea was one of the decisive factors in the German defeat in 1918. During the Second World War , naval activity in the European theatre was primarily limited to the Atlantic . During the Battle of France in May 1940, the German forces succeeded in capturing both Boulogne and Calais , thereby threatening
10836-460: The existing Junction 10 were closed to allow the final works on the London-facing sliproads at Junction 10a and the new junction opened on 31 October 2019. Since the opening of the Channel Tunnel, sections of the M20 have been used occasionally for the implementation of Operation Stack, should the ferries and/or Channel Tunnel stop running. This closes that part of the motorway and uses the area as
10962-482: The first built in the world, connecting Milan to Lake Como and Lake Maggiore , and now parts of the A8 and A9 motorways, was devised by Piero Puricelli and was inaugurated in 1924. This motorway, called autostrada , contained only one lane in each direction and no interchanges. The Bronx River Parkway was the first road in North America to utilize a median strip to separate the opposing lanes, to be constructed through
11088-412: The first half of the 20th century. Italy was the first country in the world to build controlled-access highways reserved for fast traffic and for motor vehicles only. Italy opened its first autostrada in 1924, A8 , connecting Milan to Varese . Germany began to build its first controlled-access autobahn without speed limits (30 kilometres [19 mi] on what is now A555 , then referred to as
11214-615: The following stormy weather. Over the centuries the Royal Navy slowly grew to be the most powerful in the world. The building of the British Empire was possible only because the Royal Navy eventually managed to exercise unquestioned control over the seas around Europe, especially the Channel and the North Sea. During the Seven Years' War , France attempted to launch an invasion of Britain . To achieve this France needed to gain control of
11340-507: The frontier of Switzerland to the English Channel", they reached the coast at the North Sea. Much of the British war effort in Flanders was a bloody but successful strategy to prevent the Germans reaching the Channel coast. At the outset of the war, an attempt was made to block the path of U-boats through the Dover Strait with naval minefields . By February 1915, this had been augmented by
11466-504: The highway are provided at interchanges by slip roads (ramps), which allow for speed changes between the highway and arterials and collector roads . On the controlled-access highway, opposing directions of travel are generally separated by a median strip or central reservation containing a traffic barrier or grass. Elimination of conflicts with other directions of traffic dramatically improves safety, while increasing traffic capacity and speed. Controlled-access highways evolved during
11592-442: The incident, the southern section of the bridge – which rested on a plinth south of the motorway and the cantilevered northern section – was dislodged and fell onto the carriageway below, landing on the trailer of a passing HGV and being narrowly avoided by a motorcyclist who suffered broken ribs taking avoiding action. Both carriageways of the motorway were closed to enable the removal of the broken section. The motorway reopened with
11718-477: The junction 8 to 9 section, the M20 was three lanes either side of the original A20(M) section. This was a bottleneck , so it was decided to widen this section of motorway. The road here was increased to a dual three- or four-lane road with two-lane distributor roads either side. This section was opened in 1995. To the north of Maidstone, there is an overlap between the slip roads for junctions 5 (A20) and 6 (A229). Between 2006 and 2007, junction 10 near Ashford
11844-655: The line of retreat for the British Expeditionary Force . By a combination of hard fighting and German indecision, the port of Dunkirk was kept open allowing 338,000 Allied troops to be evacuated in Operation Dynamo . More than 11,000 were evacuated from Le Havre during Operation Cycle and a further 192,000 were evacuated from ports further down the coast in Operation Aerial in June 1940. The early stages of
11970-460: The mayor of Cologne . The German Autobahn became the first nationwide highway system. In Canada , the first precursor with semi-controlled access was The Middle Road between Hamilton and Toronto , which featured a median divider between opposing traffic flow, as well as the nation's first cloverleaf interchange . This highway developed into the Queen Elizabeth Way , which featured
12096-637: The monarch of the United Kingdom retains the title Duke of Normandy in respect to the Channel Islands. The Channel Islands (except for Chausey ) are Crown Dependencies of the British Crown . Thus the Loyal toast in the Channel Islands is Le roi, notre Duc ("The King, our Duke"). The British monarch is understood to not be the Duke of Normandy in regards of the French region of Normandy described herein, by virtue of
12222-674: The most dangerous situation Britain faced in either world war. The Battle of Passchendaele in 1917 was fought to reduce the threat by capturing the submarine bases on the Belgian coast, though it was the introduction of convoys and not capture of the bases that averted defeat. In April 1918 the Dover Patrol carried out the Zeebrugge Raid against the U-boat bases. During 1917, the Dover Barrage
12348-400: The motorway system, whilst a junction is a crossing between motorways or a split/merge of two motorways. The motorway rules end at exits, but not at junctions. However, on some bridges, motorways, without changing appearance, temporarily end between the two exits closest to the bridge (or tunnel), and continue as dual carriageways . This is in order to give slower vehicles a possibility to use
12474-439: The other. Other methods involve constructing a service drive that shortens the long driveways (typically by less than 100 metres (330 ft)). An interchange or a junction is a highway layout that permits traffic from one controlled-access highway to access another and vice versa, whereas an access point is a highway layout where traffic from a distributor or local road can join a controlled-access highway. Some countries, such as
12600-574: The power vacuum left by the retreating Romans, the Germanic Angles , Saxons , and Jutes began the next great migration across the North Sea. Having already been used as mercenaries in Britain by the Romans, many people from these tribes crossed during the Migration Period , conquering and perhaps displacing the native Celtic populations. The attack on Lindisfarne in 793 is generally considered
12726-477: The rate is higher than the risk on urban roads. Speeds are higher on rural roads and autobahns than urban roads, increasing the severity potential of a crash. According to ETSC, German motorways without a speed limit, but with a 130 km/h (81 mph) speed recommendation, are 25% more deadly than motorways with a speed limit. Germany also introduced some 130 km/h (81 mph) speed limits on various motorway sections that were not limited. This generated
12852-527: The retaining ridge, causing the rock dam to fail and releasing lake water into the Atlantic. After multiple episodes of changing sea level, during which the Fosses Dangeard were largely infilled by various layers of sediment, another catastrophic flood some 180,000 years ago carved a large bedrock-floored valley, the Lobourg Channel , some 500 m wide and 25 m deep, from the southern North Sea basin through
12978-643: The rights of light , air and access to highways, but not parkways and freeways; the latter two are distinguished in that the purpose of a parkway is recreation, while the purpose of a freeway is movement. Thus, as originally conceived, a freeway is simply a strip of public land devoted to movement to which abutting property owners do not have rights of light, air or access. Freeways, by definition, have no at-grade intersections with other roads, railroads or multi-use trails . Therefore, no traffic signals are needed and through traffic on freeways does not normally need to stop at traffic signals. Some countries, such as
13104-502: The route. Most of the traffic for the Channel ports was using the A2 / M2 route. When the Channel Tunnel was ready for construction, it was decided to complete the M20 between junctions 8 and 9 and this opened in 1991. Concurrent to this was the extension to Dover as part of the A20 which opened in 1993. A new junction 11A was also constructed to serve the Channel Tunnel. Following completion of
13230-510: The sea include Oceanus Gallicus (the Gaulish Ocean) which was used by Isidore of Seville in the sixth century. The term British Sea is still used by speakers of Cornish and Breton , with the sea known to them as Mor Bretannek and Mor Breizh respectively. While it is likely that these names derive from the Latin term, it is possible that they predate the arrival of the Romans in
13356-432: The side of a divided highway that has a lot of private access on one side and sometimes has long driveways on the other side since an easement for widening comes into place, especially in rural areas. When a third carriageway is added, sometimes it can shift a directional carriageway by 20–60 metres (50–200 ft) (or maybe more depending on land availability) as a way to retain private access on one side that favors over
13482-592: The sinking of Doggerland , with Britain again becoming an island. As a busy shipping lane, the Channel experiences environmental problems following accidents involving ships with toxic cargo and oil spills. Indeed, over 40% of the UK incidents threatening pollution occur in or very near the Channel. One occurrence was the MSC Napoli , which on 18 January 2007 was beached with nearly 1700 tonnes of dangerous cargo in Lyme Bay,
13608-606: The sleeve (French: la manche ) shape of the Channel. Folk etymology has derived it from a Celtic word meaning 'channel' that is also the source of the name for the Minch in Scotland, but this name is not attested before the 17th century, and French and British sources of that time are clear about its etymology. The name in French has been directly adapted in other languages as either a calque , such as Canale della Manica in Italian or
13734-418: The southern part of the North Sea by the Strait of Dover at its northeastern end. It is the busiest shipping area in the world. It is about 560 kilometres (300 nautical miles; 350 statute miles) long and varies in width from 240 km (130 nmi; 150 mi) at its widest to 34 km (18 nmi; 21 mi) at its narrowest in the Strait of Dover . It is the smallest of the shallow seas around
13860-510: The southern, French coast. The major languages spoken in this region are English and French . Roman sources as Oceanus Britannicus (or Mare Britannicum , meaning the Ocean, or the Sea, of the Britons or Britannī ). Variations of this term were used by influential writers such as Ptolemy , and remained popular with British and continental authors well into the modern era. Other Latin names for
13986-599: The southward tide (surge) of the North Sea (equally from the Atlantic). The Channel does not experience, but its existence is necessary to explain the extent of North Sea storm surges , such as necessitate the Thames Barrier , Delta Works , Zuiderzee works ( Afsluitdijk and other dams). In the UK Shipping Forecast the Channel is divided into the following areas, from the east: The full English Channel connecting
14112-500: The stretch of A20 through Maidstone which was renumbered A2020 . This was the first stretch of motorway to open south of London. Plans for a bypass of Maidstone had existed since the 1930s, originally as an all-purpose project, before being upgraded to motorway standard in the 1950s. When the motorway was extended westwards towards London in the 1970s, it was renamed M20 and the A2020 reverted to A20. The section around Ashford (junctions 9–10)
14238-565: The territory he and his Viking allies had previously conquered. The name "Normandy" reflects Rollo's Viking (i.e. "Northman") origins. The descendants of Rollo and his followers adopted the local Gallo-Romance language and intermarried with the area's inhabitants and became the Normans – a Norman French -speaking mixture of Scandinavians , Hiberno-Norse , Orcadians , Anglo-Danish , and indigenous Franks and Gauls . Rollo's descendant William, Duke of Normandy became king of England in 1066 in
14364-614: The world! Singapore, the Cape, Alexandria , Gibraltar, Dover." However, on 25 July 1909 Louis Blériot made the first Channel crossing from Calais to Dover in an aeroplane. Blériot's crossing signalled a change in the function of the Channel as a barrier-moat for England against foreign enemies. Because the Kaiserliche Marine surface fleet could not match the British Grand Fleet, the Germans developed submarine warfare , which
14490-406: The year 2010, comparing overall fatality rates with motorway rates (regardless of traffic intensity): The German autobahn network illustrates the safety trade-offs of controlled access highways. The injury crash rate is very low on autobahns, while 22 people died per 1,000 injury crashes—although autobahns have a lower rate than the 29 deaths per 1,000 injury accidents on conventional rural roads,
14616-443: Was European route E4 from Gävle to Axmartavlan , Sweden. The high rate of crashes with severe personal injuries on that (and similar) roads did not cease until a median crash barrier was installed, transforming the fatal crashes into non-fatal crashes. Otherwise, freeways typically have at least two lanes in each direction; some busy ones can have as many as 16 or more lanes in total. In San Diego, California , Interstate 5 has
14742-454: Was also a " Domnonia " (Devon) in Brittany as well. In February 1684 , ice formed on the sea in a belt 4.8 km (3.0 mi) wide off the coast of Kent and 3.2 km (2.0 mi) wide on the French side. Remnants of a mesolithic boatyard have been found on the Isle of Wight . Wheat was traded across the Channel about 8,000 years ago. "... Sophisticated social networks linked
14868-536: Was first recorded in Middle English in the 13th century and was borrowed from the Old French word chanel (a variant form of chenel 'canal'). By the middle of the fifteenth century, an Italian map based on Ptolemy 's description named the sea as Britanicus Oceanus nunc Canalites Anglie (Ocean of the Britons but now English Channel). The map is possibly the first recorded use of the term English Channel and
14994-514: Was in common usage in England . Following the Acts of Union 1707 , this was replaced in official maps and documents with British Channel or British Sea for much of the next century. However, the term English Channel remained popular and was finally in official usage by the nineteenth century. The French name la Manche has been used since at least the 17th century. The name is usually said to refer to
15120-453: Was introduced in West Kent between junctions 4 and 7, with variable speed limits. In August 2016, part of a pedestrian footbridge connecting areas of Ryarsh divided by the motorway was brought down – initially suspected to be the result of an impact by a digger from nearby works to widen the southbound bridge at junction 4 being carried on a low-loader that was moving along the hard shoulder. In
15246-420: Was near the 'Old England' pub on the A20 at Hollingbourne Corner, junction 8, a temporary terminus until 1992, to the A229. It would be £1.5 million for the eastern section 5.25 miles (8.4 km), to open by the end of March 1960, built by Costain, designed by Scott Wilson. Work was started at Hollingbourne on Monday 5 May 1958 by Richard Nugent, Baron Nugent of Guildford , this was only five weeks after
15372-510: Was originally the A20 Ashford Bypass with actual construction having started before World War 2 – although the route itself was not opened until 19 July 1957. The bypass started at Willesborough near the current location of junction 10 and terminated south of the existing junction 9 at the current Drover's Roundabout. A section of the old bypass is still visible now named Simone Weil Avenue. The original bridge that brought Canterbury Road over
15498-486: Was re-sited with improved mines and more effective nets, aided by regular patrols by small warships equipped with powerful searchlights. A German attack on these vessels resulted in the Battle of Dover Strait in 1917 . A much more ambitious attempt to improve the barrage, by installing eight massive concrete towers across the strait was called the Admiralty M-N Scheme but only two towers were nearing completion at
15624-549: Was remodelled to increase capacity when the bridges across the motorway were modified to provide three lanes of traffic at the roundabout, and local approach roads were widened, with new traffic lights to control traffic flows at the junction between the A292 Hythe Road and the London-bound M20 entry slip road. A new footbridge was also constructed across the motorway. The cost was £4.9 million. A Controlled motorway scheme
15750-539: Was the Narrow Seas , a collective term for the channel and North Sea . As England (followed by Great Britain and the United Kingdom) claimed sovereignty over the sea, a Royal Navy Admiral was appointed with maintaining duties in the two seas. The office was maintained until 1822, when several European nations (including the United Kingdom) adopted a three-mile (4.8 km) limit to territorial waters. The word channel
15876-482: Was to become a far greater threat to Britain. The Dover Patrol , set up just before the war started, escorted cross-Channel troopships and prevented submarines from sailing in the Channel, obliging them to travel to the Atlantic via the much longer route around Scotland. On land, the German army attempted to capture French Channel ports in the Race to the Sea but although the trenches are often said to have stretched "from
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