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Primary status

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Primary status

Roads in the United Kingdom form a network of varied quality and capacity. Road distances are shown in miles or yards and UK speed limits are in miles per hour (mph) or use of the national speed limit (NSL) symbol. Some vehicle categories have various lower maximum limits enforced by speed limiters. Enforcement of UK road speed limits increasingly uses speed guns, automated in-vehicle systems and automated roadside traffic cameras. A unified numbering system is in place for Great Britain, whilst in Northern Ireland there is no available explanation for the allocation of road numbers.[1]

The earliest specifically engineered roads were built during the British Iron Age. The road network was expanded during the Roman occupation. Some of these survive and others were lost. New roads were added in the Middle Ages and from the 17th century onwards. Whilst control has been transferred from local to central bodies and back again, currently management and development of the road network is shared between local authorities, the devolved administrations of Scotland, Wales and Northern Ireland and the Highways Agency. Certain aspects of the legal framework remain under the competence of the United Kingdom parliament.

Although some roads have much older origins, the network was subject to major development from the 1950s to the mid-1990s. From then, construction of roads has become increasingly controversial with direct action campaigns by environmentalists in opposition.


In the UK, vehicles drive on the left and on multi-lane carriageways drivers are expected to keep to the left lane except when overtaking.[2] In Great Britain, the Highway Code applies to drivers.[3] In Northern Ireland the Highway Code for Northern Ireland applies.[4]

UK speed limits are shown in mph[5] and are in increments of 10 ranging from 20 miles per hour (32 km/h) to 70 miles per hour (113 km/h). Unless a lower speed limit is posted on a road the national speed limit applies, which varies between class of vehicles and the type of road. In a built-up area (usually indicated by street lights),[6] unless signs indicate otherwise, a limit of 30 miles per hour (48 km/h) applies. Other limits are shown in the table.[7]

National speed limits on roads in the UK
Type of vehicle Speed limit
Single carriageway Dual carriageway Motorway
mph km/h mph km/h mph km/h
Car/motorcycle, car derived vans up to 2 tons 60 97 70 110 70 110
Car with caravan or trailer 50 80 60 97 60 97
Bus, Minibus or coach up to 13.12 yd long 50 80 60 97 70 110
Goods vehicle below 7.5 tons 50 80 60 97 70 110
Goods vehicle over 7.5 tons 40 64 50 80 60 97

Generally in the UK, goods vehicles are electronically speed limited to 90 km/h (56 mph). For a road to be classed as a dual carriageway, the two directions of traffic flow must be physically separated by a central reservation.[8]


Roads in the UK are classified into M (Motorway), A,[9] and B[9] roads. For internal purposes, Local Authorities may also use C,[10] D and U[10] (the latter standing for 'Unclassified'[specify]). Each road is given a number which is combined with the prefix, for example M40, A40 and B1110, although their informal or traditional names may still be used or heard occasionally; an example would be the Great North Road (now part of the A1) and the Great Cambridge Road (modern A10). Roads in Great Britain are numbered according to a zonal system.[11] There is no available explanation for the allocation of road numbers in Northern Ireland.[1] Motorways are used for the majority of the major inter-urban routes and are designed to carry long distance traffic. Between them is the primary route network, which are A roads. A primary route is defined as:[8]

...a route, not being a route comprising any part of a motorway, in respect of which the Secretary of State —

(a) in the case of a trunk road is of the opinion, and

(b) in any other case after consultation with the traffic authority for the road comprised in the route is of the opinion,

that it provides the most satisfactory route for through traffic between places of traffic importance

Primary destinations

Primary destinations are usually cities and large towns, to which, as a result of their size, a high volume of traffic is expected to go. However, in rural areas, smaller towns or villages may be awarded primary status if located at junctions of significant roads: for example, Llangurig in Wales and Crianlarich in Scotland. As a further example, Scotch Corner in northern England is not a village - only a hotel and a few other buildings - yet has the status of a primary destination resulting from its location at the interchange of the A1 and A66 roads. For similar reasons, certain airports, sea ports, bridges and tunnels have been designated as primary destinations.

The status of both primary destinations and roads is maintained by the Department for Transport in combination with the Highways Agency in England and Wales and the Scottish Government in Scotland.[specify] The concept of primary roads was introduced in the 1960s as part of a national reclassification of roads.[9]

Regional destinations

Regional destinations are commonly used on long distance routes throughout the country alongside primary destinations. They are displayed on signs in capitals to distinguish them from towns and cities.[12] The boundaries of these regional destinations are not specifically defined and apply to generalised areas.

  • The EAST
  • The LAKES
  • The NORTH
  • The SOUTH
  • The WEST


Signage on the UK network conforms broadly to European norms, though a number of signs are unique to Britain and direction signs omit European route numbers. All length distances are shown in miles or yards,[13] speed is in miles per hour[5] whilst height and width restrictions are required to be shown in feet and inches (though the metric measurements may optionally also appear). Until recently the government was obliged to convert all signs to metric under a commitment made at the time of the UK's accession to the European Economic Community. The European Commission has now abandoned that requirement.[14]

The signage system currently in use was developed in the late 1950s and the early 1960s by the Anderson Committee, which established the motorway signing system, and by the Worboys Committee, which reformed signing for existing all-purpose (non-motorway) roads. It was introduced in 1965 and is governed by the Traffic Signs Regulations and General Directions.[specify] Signs may be of an informative, warning or instructional nature.[specify] Instructional signs are generally circular, warnings are triangular and informative signs are rectangular or square.[specify] Motorway informative signs use white text on a blue background, primary routes are indicated by green directional and distance signs with yellow text, whilst secondary roads use black text on a white background.[15]

Taxes and fees

Motoring taxation

After the end of the Turnpike trusts, roads have been funded from taxation. Two new vehicle duties were introduced — the locomotive duty and the trade cart duty in the 1888 budget. Since 1910 the proceeds of road vehicle excise duties were dedicated to fund the building and maintenance of the road system.[16] and since 1920 century until 1937 most roads in the United Kingdom were funded from the Road Fund using taxes raised from fuel duty and Vehicle Excise Duty.[17] Since 1937 roads have been funded from general taxation with all motoring duties, including VAT, being paid directly to the Treasury.[18]

Tolls and road (congestion) pricing

Main article: Road pricing in the United Kingdom

Tolls are used for some major bridges and tunnels, for example the Dartford Crossing.[19] The M6 Toll, originally the Birmingham Northern Relief Road, is designed to relieve the M6 through Birmingham, which is one of the most heavily used roads in the country.[20] There were two public toll roads (Roydon Road in Stanstead Abbots and College Road in Dulwich) and about five private toll roads.

Since 2006, Road pricing is in operation in London and in Durham.[21]

Road traffic safety

The United Kingdom is among the best countries in the world for road safety and is still improving, but the improvement has not kept pace with those in Sweden and the Netherlands.[22]

In June 2008 the Road Safety Foundation reported that 30 per cent of the primary route network in Great Britain failed to rate as safe, and a quarter of all motorways were outside the safest risk band.[23]

The 8-mile (13 km) Cat and Fiddle Road between Macclesfield and Buxton was named as Britain's most dangerous road. The single-carriageway road has been the scene of 43 fatal or serious collisions since 2001, nearly three-quarters of them involving motorcyclists. When collisions involving motorcyclists are removed from the analysis, the A61 between Barnsley and Wakefield was found to be the most dangerous road in Britain.[24]

Between 2003 and 2006, the most improved safety record was for the A453 from the A38 to Tamworth in Staffordshire. This rural single carriageway saw an 88 per cent drop in the number of fatal or serious collisions in the last six years, taking it from a medium risk road to one of the safest. According to the Foundation, this has been achieved by introducing traffic lights, speed limit reductions and village pedestrian facilities.[25]

Research undertaken in July 2008 has shown that investment in a safe road infrastructure programme could yield a one-third reduction in road deaths, saving as much as £6 billion per year.[26] A consortium of 13 major road safety stakeholders have formed the Campaign for Safe Road Design, which is calling on the UK Government to make safe road design a national transport priority.[27]


Responsibility for the road network differs between trunk and non trunk routes. Trunk roads, which are the most important roads, are administered by the Highways Agency in England, Transport Scotland in Scotland and the Department of Economy and Transport in Wales.[28] England's 6,500 miles (10,461 km) of trunk roads account for 33% of all road travel and 50% of lorry travel.[29] Scotland has 2,174 miles (3,499 km)[30] (about 7% of the total roads in Scotland), accounting for 35% of all road journeys and over 50% of lorry movements.[31] Wales has 1,000 miles (1,600 km) of trunk roads.[32] In London, Transport for London is responsible for all trunk roads and other major roads, which are part of the Transport for London Road Network.[28] All other roads are the responsibility of the relevant County Council or unitary authority.[28] In Northern Ireland, the Roads Service Northern Ireland is responsible for all 5,592 miles (8,999 km) roads.[28][33] The pan-British total is 24,559 km.

Whilst generally they are trunk roads, several motorways are the responsibility of local authorities, for example the M275.[34]

During design, planning, maintenance and construction, metric is used. As a result (and anticipating that the roadsigns themselves will one day be changed to display in metric units) recently erected signs are increasingly being placed at metric intervals but display an imperial unit as required by the current road-signage rules. For example, a 110 yd marker might actually be placed at the 100 m distance. Since 2008, location marker posts have appeared on motorways and major A roads in England, situated generally at intervals of 500 metres (though the dimension is not given). These repeat the information given on the co-sited surveyors' marker post which, since the 1960s have reported distances on such roads in kilometres from a datum—usually the start of the road, or the planned start-point of the road.


Iron Age

The earliest evidence of engineered roads dates back to the 1st century BC. A metalled and cambered road, 1.5 metres high and six metres wide, was unearthed at Bayston Hill quarry, near Shrewsbury.[35] A timber road was preserved in peat in Geldeston, Norfolk, with tree rings suggesting a date of 75 BC, likely built by the Iceni tribe.[36]

Roman Britain

Roads built in the first phase of Roman occupation (43–68 AD) connected London with the ports used in the invasion (Chichester and Richborough), and with the earlier legionary bases at Colchester (Camulodunum), Lincoln (Lindum), Wroxeter (Viroconium), Gloucester and Exeter.[37] As Roman influence expanded, so did the network, until around 180 AD when the known network was complete.[specify]

Few Roman roads extended into Scotland due to their inability to subjugate the local population. Part of the Scottish Lowlands came under Roman control in 142, and the Antonine Wall was constructed on the northern boundary. However, the Roman legions withdrew in 164 to their former northern boundary, Hadrian's Wall.

The primary function of Roman roads was to allow the rapid movement of troops and military supplies, but it also provided vital infrastructure for trade and the transport of goods. The roads were paved, a first for the island, and could carry heavy goods in all weathers.[38] Following the Roman withdrawal from Britain, road maintenance became a very ad-hoc activity.

Medieval roads

A network of roadways was developed in Britain in the Middle Ages to supplement the use of rivers as a system of transportation. Many of these roadways were developed as a result of trading of goods and services, such as wool, sheep, cattle and salt. They linked together market towns, towns with bridges, harbours and ports. Other roadways developed to meet the needs of pilgrims visiting shrines, such as Walsingham, and for transporting corpses from isolated communities to local graveyards.

Pre 20th century

The first legislated control in England was introduced under the Highways Act 1555.[39] Road rates were introduced in England and Wales in the 17th century. The first turnpike road, whereby travellers paid tolls to be used for road upkeep, was authorised by the Highways Act 1663 for a section of the Great North Road in Hertfordshire.[39][40] The first turnpike trust was established by the Parliament of England through a Turnpike Act in 1706. Scotland continued to maintain its own Parliament until the Acts of Union 1707, when the two parliaments merged to form the Kingdom of Great Britain.

In the second half of the 18th century, turnpike trusts became numerous, with trusts also set up in Wales and lowland Scotland.[41] This expansion was facilitated by the ability to use mortgages to fund the work.[41] By 1821 there were 18,000 miles (29,000 km) of turnpike roads in England, with 1,000 trusts by 1845[42]

The Rebecca Riots in Wales between 1839 and 1843 against high toll.[43] The riots ceased after some ringleaders, John Jones (Shoni Sguborfawr) and David Davies (Dai'r Cantwr), were convicted and transported to Australia.[44] Following several attempts at reform, detrunking began in the 1860s with the last trust ending in 1885.[39] The protests prompted several reforms, including a Royal Commission into the question of toll roads. The Local Government Act 1888 created borough and county councils with responsibility for maintaining the major roads.[42]

After complaints about the first tram companies damaging the road surface, Parliament introduced the Tramways Act 1870, making tram companies responsible for the maintenance of the shared surface of the tramway and several feet either side, as a condition of being granted a licence.[45] This was a popular move as maintenance was removed from the public purse. The local authority could also purchase the whole line at a later date at a discount, or force the tram company to reinstate the road.


The Roads Act 1920 brought in the Road Fund, with the Government receiving revenue from excise duty on road vehicles and from the sale of licences for horse-drawn carriages and driving licences.[46] As road traffic began to grow, the condition of the road network became an issue, with most of it in a poor state of repair.[47] The new Ministry of Transport created a classification system for the important routes connecting large population centres or for through traffic, with the definitive list being published in 1922/3 and revised in 1926/7.[9][48]

High unemployment after the end of World War I led the Minister of Transport to provide grant funding to the County Councils to improve roads, particularly where labour was recruited from areas of high unemployment and adjoining areas, and men with dependants. Two unemployment relief programmes were run, the first from 1920 to 1925 and the second from 1929 to 1930.[46] Government grants were limited to trunk roads and bridges, with the money coming from the Road Fund.[46] Some 500 miles (800 km) of bypasses were built by 1935, about half of what was originally planned at the start of the programmes.[46] In 1930, responsibility for all roads was vested in the County councils.[39] The first inter-urban new road built in the UK was the East Lancs Road, which was built between 1929 and 1934 at a cost of £8 million.[41][49]

For the first time since the Roman occupation, the Ministry of Transport took direct control of the core road network through the Trunk Roads Act 1936.[50] During the 1930s both the Institution of Highway Engineers and The County Surveyors' Society had published plans for a network of high speed roads,[51] whilst the Minister of Transport, Leslie Burgin, also visited the autobahn under construction in Germany. Lancashire County Council proposed a new scheme for a motorway and it was agreed to go ahead. This was, however, postponed due to the start of World War II.[52]

During World War II, government plans were drawn up to create a new network of high speed routes across the country.[47] The passing of the Special Roads Act 1949 gave the government legal powers to build roads that were not automatically rights of way for certain types of user.


In 1958 the first motorway was opened as the Preston Bypass, now part of the M6 motorway.[53] The first major motorway to open was the M1 between Crick and Berrygrove.[53]

In 1963 a report on urban transport planning policy, Traffic in Towns, was produced for the UK Department of Transport by a team headed by the architect, civil engineer and planner Colin Buchanan.[54] While it advocated the construction and reorganisation of towns to accommodate the motor car and lorry, it stressed that this would have to be balanced with restrictions, in accordance with local needs. It highlighted the urgency of the problem of dealing with the expected massive growth in road traffic,[55] the damage it could cause to our towns and cities if unplanned,[56] the eventual need for demand management[57] but with implications of restricting the mass of the population from doing something they didn't see as wrong,[58] and of the inevitable need for a change in policy as the social costs increased.[59]

In 1966 a revision of design standards was proposed which would, it was stated, save "acres of land" and £22,000 per mile in construction costs. The revision involved reducing from 10 ft (3 m) to 5 ft (1.5 m) the width of roadside grass verges on newly constructed "rural" motorways, and removing 1 foot (0.3 m) of the width of the "marginal strips" that separated each carriageway from the central reservation.[60]

The 1968-9 Ministry of Transport report Roads in England planned to complement the new interurban routes with £1bn of new urban trunk roads outside London in order to "alleviate traffic congestion", complemented by parking controls, traffic management and public transport.[61]

The first 1,000 miles (1,600 km) of motorway had been built by 1972[62] and more motorways opened into the 1980s;[63]

Whilst roads outside urban areas continued to be built throughout the 1970s, the urban routes soon ran into opposition. Plans by the Greater London Council for a series of ringways were cancelled following extensive protests headed by Homes before Roads and a rise in costs.[64] Plans to widen the Archway Road in London[65] were also hit by determined opposition over a 20-year period from the 1970s.[66]

Whilst work on planning motorways in Northern Ireland had begun prior to the Second World War, the legal authority for motorways was not provided for until the Special Roads Act (Northern Ireland) 1963, similar to that in the 1949 Act.[67] The first motorway to open was the M1 motorway in 1962, though did so under temporary powers until the Special Roads Act had been passed.[68] Work on the motorways continued until the 1970s, when the oil crisis and The Troubles both intervened, causing the abandonment of many schemes.[69]

1979 – 1997

The Conservative government of Margaret Thatcher from 1979 adopted a pro roads policy. During this period numerous road upgrades were built and the M25 motorway was completed. In 1989 it announced a large-scale roads programme (stated to be the largest since the Romans) in the Roads for Prosperity White Paper. It proposed 500 road schemes at a cost of £23 billion and foresaw an increase of road traffic of 142 percent by 2025.[70] It would have involved the doubling of the trunk road capacity with around 150 bypasses being built, caricatured in later years as predict and provide, whereby the government predicted the required capacity in forthcoming years and built roads to match.[71] From 1985 to 1995, the road network expanded by 24,000 miles (38,624 km).[72]

This road building programme continued into the start of the Premiership of John Major. In the early 1990s the government decided to complete the M3 motorway by building a six-lane road in a cutting through Twyford Down. This attracted the first direct action protests against a major road in the country. Construction work was delayed considerably, and anti roads protesters gained large amounts of publicity.[73] The Newbury bypass saw some of the largest protests against a road in the UK. Proposed originally in the 1980s, the bypass was subject to strong support and opposition.[74] Also in this time frame, the M11 link road protest saw protracted disturbance during the upgrading of a section of the A12 through east London. Costs increased rapidly, the Newbury bypass being 50% over budget and many other schemes showed increases of 100%.[75]

The Standing Advisory Committee on Trunk Road Assessment had also concluded in 1994 that building new roads simply generated more traffic, and was therefore largely self-defeating.[76] By 1994, following the recession of the early 1990s a significant number of remaining schemes were cancelled, although the government still intended to continue with others using private financing.[77] The Secretary for state for transport, Dr Brian Mawhinney launched a 'Great Debate' about the future direction for transport in the UK and the required level of road building[78] stating that the road network was "broadly complete".[79]

A major Royal Commission report, 'Transport and the Environment' was published in October 1994 highlight the serious environmental consequences of UK's transport system in response to which the New Scientist commented "Rarely, if ever, can a ministry have emerged so badly from an official report as John MacGregor's old department" in an article titled "Head-on collision over transport: The British government has received its sternest warning yet that its unflagging support for the car is seriously at odds with its own green principles".[80]

The last new motorway in the United Kingdom (The M3 motorway in Northern Ireland) opened in 1994.[81] In 1996 the total length of motorways reached 2,000 miles (3,200 km).[82]

1997 – the present day

After the election of the Labour government in 1997, most remaining road schemes were cancelled[83][84] and problem areas of the road network subject to multi-modal studies to investigate non-road alternatives, following the introduction of the A New Deal for Trunk Roads in England White Paper.[85]

In 1998, it was proposed to transfer parts of the English trunk road network to local councils, retaining central control for the network connecting major population centres, ports, airports, key cross-border links and the Trans-European Road Network.[86] Around 40% of the network was transferred to local authorities.[50]

In 2002 the government proposed a new major road building program with 360 miles (580 km) of the strategic road network to be widened, 80 major new trunk road schemes to improve safety and 100 new bypasses on trunk and local roads.[87] The protesters reformed.[88]

In 2004 the Government announced in the Queen's speech a major new funding source from transport schemes, the Transport Innovation Fund (TIF).

In 2007 a new Planning Bill was introduced to parliament which would speed up the process of approving new roads and other transport infrastructure but which has raised concerns that it may erode democracy[89] and be a "developer's charter".[90]

Traffic has increased by 80% between 1980 and 2005 whilst road capacity has increased by 10%.[91]

See also


External links

  • Highways Agency network map
  • Map of Scottish Trunk Roads
  • Interactive Map of Average Daily Traffic for every major UK Road
  • International Transport Statistics Database: Transport in Great Britain
  • EuroRAP GB Tracking Survey Results 2008
  • Pathetic Motorways, a list of unusual or "lost" motorways in Britain

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