Bath Road
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The A4 is a major road in
England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
from
Central London Central London is the innermost part of London, in England, spanning the City of London and several boroughs. Over time, a number of definitions have been used to define the scope of Central London for statistics, urban planning and local gove ...
to
Avonmouth Avonmouth ( ) is a port and outer suburb of Bristol, England, on the north bank of the mouth of the River Avon and the eastern shore of the Severn Estuary. Part of the Port of Bristol, Avonmouth Docks is important to the region's maritime eco ...
via
Heathrow Airport Heathrow Airport , also colloquially known as London Heathrow Airport and named ''London Airport'' until 1966, is the primary and largest international airport serving London, the capital and most populous city of England and the United Kingdo ...
,
Reading Reading is the process of taking in the sense or meaning of symbols, often specifically those of a written language, by means of Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifacete ...
,
Bath Bath may refer to: * Bathing, immersion in a fluid ** Bathtub, a large open container for water, in which a person may wash their body ** Public bathing, a public place where people bathe * Thermae, ancient Roman public bathing facilities Plac ...
and
Bristol Bristol () is a City status in the United Kingdom, cathedral city, unitary authority area and ceremonial county in South West England, the most populous city in the region. Built around the River Avon, Bristol, River Avon, it is bordered by t ...
. It is historically known as the Bath Road with newer sections including the Great West Road and Portway. The road was once the main route from London to Bath, Bristol and the west of England and formed, after the A40, the second main western artery from London. Although most traffic is carried by the
M4 motorway The M4, originally the London-South Wales Motorway, is the third longest motorway in the United Kingdom, running from west London to southwest Wales. The English section to the Severn Bridge was constructed between 1961 and 1971; the Welsh ele ...
today, the A4 still acts as the main route from
Bristol Bristol () is a City status in the United Kingdom, cathedral city, unitary authority area and ceremonial county in South West England, the most populous city in the region. Built around the River Avon, Bristol, River Avon, it is bordered by t ...
to
London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...
for non-motorway traffic.


History


Turnpikes

The A4 has gone through many transformations through the ages from pre-Roman routes,
Roman roads Roman roads ( ; singular: ; meaning "Roman way") were physical infrastructure vital to the maintenance and development of the Roman state, built from about 300 BC through the expansion and consolidation of the Roman Republic and the Roman Em ...
(such as the one passing Silbury Hill), and basic wagon tracks. During the Middle Ages, most byways and tracks served to connect villages with their nearest market town. A survey of Savernake Forest near Hungerford in 1228 mentions "The King's Street" running between the town and
Marlborough Marlborough or the Marlborough may refer to: Places Australia * Marlborough, Queensland * Principality of Marlborough, a short-lived micronation in 1993 * Marlborough Highway, Tasmania; Malborough was an historic name for the place at the sou ...
. This street corresponded roughly with the route of the modern A4. In 1632, Thomas Witherings was appointed Postmaster of Foreign Mails by Charles I. Three years later, the king charged him with building six "Great Roads" to aid in the delivery of the post, of which the Great West Road was one. It was not until the 17th century that a distinct route between London and Bristol started to resemble today's road. During the 17th century, the A4 was known as the Great Road to Bristol. When Queen Anne started patronising the spa city of Bath, the road became more commonly known as Bath Road. Over the years, the direction of the road has taken many detours depending on such factors as changes in tolls or turnpike patronage. For example, in 1750 the toll road from London was altered to go through
Melksham Melksham () is a town and civil parish on the Bristol Avon, River Avon in Wiltshire, England, about northeast of Trowbridge and south of Chippenham. The parish population was 18,113 at the 2021 census. History Early history Excavations in ...
; and in 1695 the map maker, John Ogilby, produced a map of the Hungerford area of the Great West Road showing two possible routes. As Bath became more popular with the wealthy and famous, it was inevitable that
turnpike trust Turnpike trusts were bodies set up by individual Acts of Parliament in the United Kingdom, Acts of Parliament, with powers to collect road toll road, tolls for maintaining the principal roads in Kingdom of Great Britain, Britain from the 17th ...
s would be set up under the terms of the Turnpike Acts to pay for maintenance and improvements to the road. The first turnpike on this road was between
Reading Reading is the process of taking in the sense or meaning of symbols, often specifically those of a written language, by means of Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifacete ...
and Theale in 1714. Due to increasing traffic, sections of the road between
Kensington Kensington is an area of London in the Royal Borough of Kensington and Chelsea, around west of Central London. The district's commercial heart is Kensington High Street, running on an east–west axis. The north-east is taken up by Kensingt ...
, over Hounslow Hill, to Twyford were turnpike by 1717 with the remaining sections placed under turnpike trusts. As turnpike trusts were individually run, there was the possibility for greatly differing road conditions, especially over the
London Clay The London Clay Formation is a Sediment#Shores and shallow seas, marine formation (geology), geological formation of Ypresian (early Eocene Epoch, c. 54-50 million years ago) age which outcrop, crops out in the southeast of England. The London C ...
basin of
Kensington Kensington is an area of London in the Royal Borough of Kensington and Chelsea, around west of Central London. The district's commercial heart is Kensington High Street, running on an east–west axis. The north-east is taken up by Kensingt ...
,
Brentford Brentford is a suburban town in West (London sub region), West London, England and part of the London Borough of Hounslow. It lies at the confluence of the River Brent and the River Thames, Thames, west of Charing Cross. Its economy has dive ...
,
Hounslow Hounslow ( ) is a large suburban district of West London, England, west-southwest of Charing Cross. It is the administrative centre of the London Borough of Hounslow, and is identified in the London Plan as one of the 14 metropolitan cen ...
and
Slough Slough () is a town in Berkshire, England, in the Thames Valley, west of central London and north-east of Reading, at the intersection of the M4, M40 and M25 motorways. It is part of the historic county of Buckinghamshire. In 2021, the ...
, where winter conditions left the way muddy and uneven. This was not always the case with the Bath Road, as many of the wealthy landowners along the route co-operated informally and exercised a large amount of control over feeder roads. As a result, control of the Bath Road was easy to maintain and many inns and towns became prosperous. Tollhouses were established at
Colnbrook Colnbrook is a village in the Borough of Slough, Slough district in Berkshire, England. It lies within the historic counties of England, historic boundaries of Buckinghamshire, and straddles two distributaries of the River Colne, Hertfordshire, ...
,
Maidenhead Maidenhead is a market town in the Royal Borough of Windsor and Maidenhead in the county of Berkshire, England. It lies on the southwestern bank of the River Thames, which at this point forms the border with Buckinghamshire. In the 2021 Census, ...
, Twyford, Castle Street
Reading Reading is the process of taking in the sense or meaning of symbols, often specifically those of a written language, by means of Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifacete ...
, Thatcham and Benham. During the 1820s, the employment of good surveyors improved the condition of the road and aided an increased flow of wealthy travellers. The tolls raised from such clientele ensured that when the turnpike trusts handed over the route to local
highway board Highway districts were areas in England and Wales united for the maintenance and repair of highways. They were first formed in 1862 and consisted of groupings of civil parishes in rural areas. They were abolished in 1894 when their powers and dutie ...
s, they had no financial liabilities. Justices of the peace were empowered by the Highway Act 1862 to combine turnpike trusts into highways districts. This meant that by the late 1860s trusts were either not renewing their powers or were being terminated by general Acts of Parliament. For example, most turnpikes in Berkshire, including the Bath Road, were officially wound up by 1878 when legislation transferred responsibility for dis-enturnpiked roads to the new
county council A county council is the elected administrative body governing an area known as a county. This term has slightly different meanings in different countries. Australia In the Australian state of New South Wales, county councils are special purpose ...
s. The tollgate on the Bath Road west of Reading was removed in 1864 as the outward pressure of urban development made rates a more acceptable way of financing the maintenance of what was now a suburban road.


Postal service and coaching

With the improvement being made to the road systems, the business of moving mail became easier and thus more profitable as volumes were able to increase. In Bristol, a postal office had been well established by the 1670s. The journey time to London at this period was about 16 and three quarter hours. A letter from Bath in 1684 took about 3 days going via a postal office in Marshfield on the Bristol Road. (The route to Bristol did not yet go through Bath at this time). Journey times during the Turnpike era fell with the improvements from 2 days in 1752 to 38 hours in 1782 and 18 hours by 1836. Royal Mail coaches in 1836 were able to do the trip in 12 to 13 hours. Further improvements to regional post services were made between 1719 and 1763 due to contracts with the London Inland Letter Office negotiated by
Ralph Allen Ralph Allen ( – 29 June 1764) was a British postmaster, merchant and philanthropist best known for his reforms to General Post Office#Early postal services, Britain's postal system. Born in St Columb Major, Cornwall, he moved to Bath, Somers ...
, the postmaster of Bath. In the early part of the 19th century, coaching was at its height with six stagecoaches each day carrying passengers to and from London along the Bath Road in 1830, rising to ten by 1836. Hungerford is at about the midway point of the journey between London and Bristol and was ideally positioned to take advantage of the increase in coaching. In 1836, five companies operated a coaching service through Hungerford. This peak was to be short-lived following the construction of the
Great Western Railway The Great Western Railway (GWR) was a History of rail transport in Great Britain, British railway company that linked London with the southwest, west and West Midlands (region), West Midlands of England and most of Wales. It was founded in 1833, ...
. The decline in coaching traffic in Hungerford coincided with the building of the Great Western Railway from London to Bath and Bristol, and the subsequent Berks and Hants Railway line from Newbury to Hungerford itself in 1847. By 1843, it was reported that the stage coaches had ceased running between Bristol and London.


Route


Holborn Circus to Westminster (0.4 miles)

The A4 begins as New Fetter Lane in the
City of London The City of London, also known as ''the City'', is a Ceremonial counties of England, ceremonial county and Districts of England, local government district with City status in the United Kingdom, city status in England. It is the Old town, his ...
at
Holborn Circus Holborn Circus is a five-way junction at the western extreme of the City of London, specifically between Holborn (St Andrew) and its Hatton Garden (St Alban) part. Its main, east–west, route is the inchoate A40 road (Great Britain), A40 road. ...
on the A40. It goes in a southerly direction to join
Fleet Street Fleet Street is a street in Central London, England. It runs west to east from Temple Bar, London, Temple Bar at the boundary of the City of London, Cities of London and City of Westminster, Westminster to Ludgate Circus at the site of the Lo ...
where many British national newspapers at one time had their head offices.


Westminster to Hammersmith via Kensington (4.6 miles)

The road heads west through the City of Westminster via
Aldwych Aldwych (pronounced ) is a street and the name of the List of areas of London, area immediately surrounding it, in the City of Westminster, part of Greater London, and is part of the West End of London, West End West End Theatre, Theatreland. T ...
and the
Strand Strand or The Strand may refer to: Topography *The flat area of land bordering a body of water, a: ** Beach ** Shoreline * Strand swamp, a type of swamp habitat in Florida Places Africa * Strand, Western Cape, a seaside town in South Africa * ...
, passing notable landmarks such as the
Royal Courts of Justice The Royal Courts of Justice, commonly called the Law Courts, is a court building in Westminster which houses the High Court and Court of Appeal of England and Wales. The High Court also sits on circuit and in other major cities. Designed by Ge ...
, the
Savoy Savoy (; )  is a cultural-historical region in the Western Alps. Situated on the cultural boundary between Occitania and Piedmont, the area extends from Lake Geneva in the north to the Dauphiné in the south and west and to the Aosta Vall ...
and Adelphi theatres, and
Charing Cross railway station Charing Cross railway station (also known as London Charing Cross) is a London station group, central London railway terminus between the Strand, London, Strand and Hungerford Bridge in the City of Westminster. It is the terminus of the South ...
. From Charing Cross station to
Green Park The Green Park, one of the Royal Parks of London, is in the City of Westminster, Central London. Green Park is to the north of the gardens and semi-circular forecourt of Buckingham Palace, across Constitution Hill road. The park is in the m ...
, the westbound and eastbound routes of the A4 are considerably different, due to one-way systems. Westbound, the A4 continues along the Strand up to
Charing Cross Charing Cross ( ) is a junction in Westminster, London, England, where six routes meet. Since the early 19th century, Charing Cross has been the notional "centre of London" and became the point from which distances from London are measured. ...
itself, then along
Cockspur Street Cockspur Street is a short street in the City of Westminster, London, within which a very short part of Trafalgar Square links Charing Cross to Pall Mall/Pall Mall East at the point where that road changes name, opposite the traffic exit from ...
and into Pall Mall, the location of many exclusive
gentlemen's club A gentlemen's club is a private social club of a type originally established by males from Britain's upper classes starting in the 17th century. Many countries outside Britain have prominent gentlemen's clubs, mostly those associated with the ...
s as well as the
Institute of Directors The Institute of Directors (IoD) is a British professional organisation for company directors, senior business leaders and entrepreneurs. It is the UK's longest running organisation for professional leaders, having been founded in 1903 and inco ...
, before turning right along St James's Street to reach
Piccadilly Piccadilly () is a road in the City of Westminster, London, England, to the south of Mayfair, between Hyde Park Corner in the west and Piccadilly Circus in the east. It is part of the A4 road (England), A4 road that connects central London to ...
. Eastbound from Green Park, the A4 runs along the full length of Piccadilly to
Piccadilly Circus Piccadilly Circus is a road junction and public space of London's West End of London, West End in the City of Westminster. It was built in 1819 to connect Regent Street with Piccadilly. In this context, a ''List of road junctions in the Unite ...
, before turning right along Haymarket. It bears left along Pall Mall East, then right along the west side of
Trafalgar Square Trafalgar Square ( ) is a public square in the City of Westminster in Central London. It was established in the early-19th century around the area formerly known as Charing Cross. Its name commemorates the Battle of Trafalgar, the Royal Navy, ...
, past the
National Gallery The National Gallery is an art museum in Trafalgar Square in the City of Westminster, in Central London, England. Founded in 1824, it houses a collection of more than 2,300 paintings dating from the mid-13th century to 1900. The current di ...
and
Canada House Canada House () is a Greek Revival building on Trafalgar Square in London. It has been a Grade II* Listed Building since 1970. It has served as the Chancery (diplomacy), chancery of the High Commission of Canada in the United Kingdom since 192 ...
, to Charing Cross. Finally, it bears left along the east side of the Square, past
South Africa House South is one of the cardinal directions or compass points. The direction is the opposite of north and is perpendicular to both west and east. Etymology The word ''south'' comes from Old English ''sūþ'', from earlier Proto-Germanic ''*sunþaz' ...
, then right along Duncannon Street to reach Charing Cross station. The first part of
Regent Street Regent Street is a major shopping street in the West End of London. It is named after George IV of the United Kingdom, George, the Prince Regent (later George IV) and was laid out under the direction of the architect John Nash (architect), J ...
, from Waterloo Place to Piccadilly Circus, is also signed as the A4; all traffic here runs in a northbound direction. From Green Park, the A4 enters a short tunnel under
Hyde Park Corner Hyde Park Corner is between Knightsbridge, Belgravia and Mayfair in London, England. It primarily refers to a major road junction at the southeastern corner of Hyde Park, that was originally planned by architect Decimus Burton. The juncti ...
, where
Wellington Arch The Wellington Arch, also known as the Constitution Arch or (originally) as the Green Park Arch, is a Grade I-listed triumphal arch by Decimus Burton that forms a centrepiece of Hyde Park Corner in central London, at the corner where Hyde ...
is located. Afterwards, the road continues along the first part of
Knightsbridge Knightsbridge is a residential and retail district in central London, south of Hyde Park, London, Hyde Park. It is identified in the London Plan as one of two international retail centres in London, alongside the West End of London, West End. ...
, before bearing left onto
Brompton Road Brompton Road is a street located in the southern part from Knightsbridge and in the eastern part from Brompton, London, Brompton in the Royal Borough of Kensington and Chelsea and partly the City of Westminster in London. It starts from ...
. This is an affluent area of London, in which the
Harrods Harrods is a Listed building, Grade II listed luxury department store on Brompton Road in Knightsbridge, London, England. It was designed by C. W. Stephens for Charles Digby Harrod, and opened in 1905; it replaced the first store on the ground ...
and
Harvey Nichols Harvey Nichols Group Limited ( trading as Harvey Nichols) is a British luxury department store chain founded in 1831 by Benjamin Harvey; it is headquartered at its flagship store in Knightsbridge, London. It sells designer fashion collections ...
department stores are located as well as numerous
embassies A diplomatic mission or foreign mission is a group of people from a state or organization present in another state to represent the sending state or organization officially in the receiving or host state. In practice, the phrase usually denotes a ...
. At this point, the road enters the
Royal Borough of Kensington and Chelsea The Royal Borough of Kensington and Chelsea (often known by its initialism as RBKC) is an Inner London, Inner London borough with Royal borough, royal status. It is the List of English districts by area, smallest borough in London and the secon ...
. At the
Brompton Oratory Brompton Oratory, also known as the London Oratory, is a neo-classical late-Victorian Catholic parish church in the Brompton area of the Royal Borough of Kensington and Chelsea, neighbouring Knightsbridge, London. Its name stems from Oratorian ...
, the road bears right along Thurloe Place and Cromwell Gardens, past the
Victoria and Albert Museum The Victoria and Albert Museum (abbreviated V&A) in London is the world's largest museum of applied arts, decorative arts and design, housing a permanent collection of over 2.8 million objects. It was founded in 1852 and named after Queen ...
and the Ismaili Centre, and onto
Cromwell Road Cromwell Road is a major London road in the Royal Borough of Kensington and Chelsea, designated as part of the A4 road (Great Britain), A4. It was created in the 19th century and is said to be named after Richard Cromwell, son of Oliver Cromwel ...
, past the
Natural History Museum A natural history museum or museum of natural history is a scientific institution with natural history scientific collection, collections that include current and historical records of animals, plants, Fungus, fungi, ecosystems, geology, paleo ...
. At
Earls Court Earl's Court is a district of Kensington in the Royal Borough of Kensington and Chelsea in West London, bordering the rail tracks of the West London line and District line that separate it from the ancient borough of Fulham to the west, the ...
, the A4 becomes dual carriageway, and continues along West Cromwell Road, over the West London Line into West Kensington and the Borough of Hammersmith and Fulham. A section of the road from Knightsbridge to the Chiswick Flyover was the first section of Clearway designated in London. It introduced no stopping on the road during rush hours on 21 August 1961.


Hammersmith to Heathrow Airport (10.7 miles)

The A4 continues along Talgarth Road past the
London Academy of Music and Dramatic Art The London Academy of Music and Dramatic Art (LAMDA) is a drama school located in Hammersmith, London. Founded in 1861, it is the oldest specialist drama school in the British Isles and a founding member of the Federation of Drama Schools. In ...
. The road becomes elevated at the Hammersmith Flyover and heads towards
Heathrow Airport Heathrow Airport , also colloquially known as London Heathrow Airport and named ''London Airport'' until 1966, is the primary and largest international airport serving London, the capital and most populous city of England and the United Kingdo ...
as the Great West Road, passing Hammersmith's two churches of
St Paul Paul, also named Saul of Tarsus, commonly known as Paul the Apostle and Saint Paul, was a Christian apostle ( AD) who spread the teachings of Jesus in the first-century world. For his contributions towards the New Testament, he is generally ...
and
St Peter Saint Peter (born Shimon Bar Yonah; 1 BC – AD 64/68), also known as Peter the Apostle, Simon Peter, Simeon, Simon, or Cephas, was one of the Twelve Apostles of Jesus and one of the first leaders of the early Christian Church. He appears repe ...
. At this point the road is close to the
River Thames The River Thames ( ), known alternatively in parts as the The Isis, River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the Longest rivers of the United Kingdom, s ...
. The road enters
Chiswick Chiswick ( ) is a district in West London, split between the London Borough of Hounslow, London Boroughs of Hounslow and London Borough of Ealing, Ealing. It contains Hogarth's House, the former residence of the 18th-century English artist Wi ...
and the Borough of Hounslow, passing
Fuller's Brewery Fuller's Brewery in Chiswick, west London, England, was the brewing division of Fuller, Smith & Turner PLC, a family-run business from its foundation in 1845 until 2019, when it was sold to the Japanese Asahi Breweries. John Fuller's Griffin Br ...
. After Hogarth Roundabout, the road passes
Hogarth's House Hogarth's House is the former country home of the 18th-century English artist William Hogarth in Chiswick, adjacent to the A4. The House now belongs to the London Borough of Hounslow and is open to visitors as a historic house museum free o ...
and is called Hogarth Lane, then Ellesmere Road and Cedars Road. It becomes the Great West Road again just a few yards short of the start of Chiswick Flyover, which is junction 1 of the M4.
Gunnersbury Gunnersbury is an area of West London, England. Toponymy The name "Gunnersbury" originally meant "Gunner's (Gunnar's) fort", and is a combination of an old Scandinavian personal name + Middle English -''bury'', meaning, "fort", or "fortified ...
's Russian Orthodox Cathedral is clearly visible on the right. The next major intersection is Chiswick Roundabout, which is the junction for both the
North North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...
and South Circular Roads. The road then passes the Glaxo-Smith Kline premises in
Brentford Brentford is a suburban town in West (London sub region), West London, England and part of the London Borough of Hounslow. It lies at the confluence of the River Brent and the River Thames, Thames, west of Charing Cross. Its economy has dive ...
where it follows underneath its successor the M4 as far as the bridge over the
River Brent The River Brent is a river in west and northwest London, England, and a tributary of the River Thames. in length, it rises in the London Borough of Barnet, Borough of Barnet and flows in a generally south-west direction before joining the Tid ...
. The stretch between Chiswick's western border to Syon Lane (Gillette Corner) is known as the Golden Mile with some notable Art Deco factories. The road remains as the Great West Road through
Osterley Osterley ( ) is an affluent district of Isleworth in west London, England, from Charing Cross in the London Borough of Hounslow. Most of its land use is mixed agricultural and aesthetic parkland at Osterley House (National Trust), charity-r ...
and
Hounslow Hounslow ( ) is a large suburban district of West London, England, west-southwest of Charing Cross. It is the administrative centre of the London Borough of Hounslow, and is identified in the London Plan as one of the 14 metropolitan cen ...
where it splits with the A30, which is known as the Great South West Road. Between the two world wars, the Great West Road was built as a bypass to relieve traffic congestion in Brentford and Hounslow. After the A30, the A4 changes its name to Bath Road, enters Cranford, and crosses the River Crane into the Borough of Hillingdon. It then passes along the northern boundary of
Heathrow Airport Heathrow Airport , also colloquially known as London Heathrow Airport and named ''London Airport'' until 1966, is the primary and largest international airport serving London, the capital and most populous city of England and the United Kingdo ...
, before leaving the London suburbs over the M25 towards the west.


Heathrow Airport to Slough (6.7 miles)

After leaving Heathrow Airport, still the A4, it becomes the Colnbrook Bypass and climbs over the M25 motorway. This bypass for the narrow main road of
Colnbrook Colnbrook is a village in the Borough of Slough, Slough district in Berkshire, England. It lies within the historic counties of England, historic boundaries of Buckinghamshire, and straddles two distributaries of the River Colne, Hertfordshire, ...
was built after the Second World War across farmland between
Harmondsworth Harmondsworth is a village in the London Borough of Hillingdon in the county of Greater London with a short border to the south onto Heathrow Airport, London Heathrow Airport and close to the Berkshire county border. The village has no railway st ...
and the outskirts of Langley. The next major intersection is junction 5 of the M4 (Slough-East) known as the Langley junction. At this point the A4 loses its
trunk road A trunk road is a major highway with a specific legal classification in some jurisdictions, notably the United Kingdom, Sweden and formerly Ireland. Trunk roads are planned and managed at the national-level, distinguishing them from non-trunk ro ...
classification. Continuing towards
Slough Slough () is a town in Berkshire, England, in the Thames Valley, west of central London and north-east of Reading, at the intersection of the M4, M40 and M25 motorways. It is part of the historic county of Buckinghamshire. In 2021, the ...
town centre, the road, now named London Road, passes Kedermister Park on the right. Changing into Sussex Place, the architecturally impressive St Bernard's former convent is on the right. Becoming the dual carriageway Wellington Street (a late 1960s bypass for the High Street), Tesco's massive "aircraft hangar" supermarket is on the right and the Queensmere and Observatory Shopping Centres on the left. The end of this section of the Great Western Road is in the centre of Slough at the junction of William Street and Wellington Street. This spot was formerly the site of Slough's largest roundabout on the south-east corner of Thames Valley University. Nearby is Slough railway station, served by Great Western Railway. The roundabout was removed in 2011 and the university's Slough campus closed in 2011 after planning permission was granted for 1,598 flats.


Slough to Maidenhead (6.0 miles)

Continuing from the William Street / Wellington Street junction, in the centre of
Slough Slough () is a town in Berkshire, England, in the Thames Valley, west of central London and north-east of Reading, at the intersection of the M4, M40 and M25 motorways. It is part of the historic county of Buckinghamshire. In 2021, the ...
, the road heads westwards towards Maidenhead. The short stretch of dual carriageway is Wellington Street, then briefly on the most western end of the High Street, over the railway bridge for the line between Slough and Windsor Central Station. The Bath Road begins on the west side of the bridge. On the left is Slough's 1936 Town Hall, now abandoned by the local council, and on the right Salt Hill Park. The next major road intersection is by the Three Tuns Pub where the A4 crosses the A355. This road goes north towards Farnham Royal, Farnham Common, Beaconsfield and the M40 at junction 2. To the south, it goes towards the M4 (junction 6, Slough Centre) and Windsor. The route at this point runs parallel to both the
Great Western Main Line The Great Western Main Line (GWML) is a main line railway in England that runs between London Paddington and . It connects to other main lines such as those from Reading to Penzance and Swindon to Swansea. The GWML is presently a part of t ...
and the M4. The road continues past the southern fringe of
Slough Trading Estate The Slough Trading Estate, founded in Slough in Buckinghamshire in 1920, was an early business park in Britain. According to the estate's owners and operators, Segro, Slough Trading Estate consists of of commercial property in Slough and provi ...
. On Slough's western boundary is the Huntercombe Spur roundabout linking the A4 to junction 7 of the M4 motorway. Here the dual carriageway ends. The road bends right at
Taplow Taplow is a village and civil parish in the Unitary Authority of Buckinghamshire, England. It sits on the left bank of the River Thames, facing Maidenhead in the neighbouring county of Berkshire, with Cippenham and Burnham to the east. It is th ...
and passes under a high railway bridge, then over the River Thames flood prevention channel. The road then goes over Maidenhead's old bridge
Maidenhead Bridge Maidenhead Bridge is a Grade I listed bridge carrying the A4 road over the River Thames between Maidenhead, Berkshire and Taplow, Buckinghamshire, England. It crosses the Thames on the reach above Bray Lock, about half a mile below Boulter' ...
, spanning the
River Thames The River Thames ( ), known alternatively in parts as the The Isis, River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the Longest rivers of the United Kingdom, s ...
, and into the eastern outskirts of Maidenhead. Along Bridge Road, St Cloud Way and Bad Godesberg Way respectively. The centre of Maidenhead is reached at the roundabout that forms the junction with the A308. Turning northwards on the A308 would lead to the A404 towards Marlow and
High Wycombe High Wycombe, often referred to as Wycombe ( ), is a market town in Buckinghamshire, England. Lying in the valley of the River Wye, Buckinghamshire, River Wye surrounded by the Chiltern Hills, it is west-northwest of Charing Cross in London, ...
. Southwards, the A308 heads towards Windsor and provides an opportunity to branch off for junction 8/9 of the M4.


Maidenhead to Reading (12.3 miles)

Heading out of Maidenhead town centre, the road follows Castle Hill and then Bath Road. At the outskirts, the road forms part of junction 9b of the A404(M)/A404, which links junction 8/9 of the M4 with junction 4 of the M40 at Handy Cross. The A4 crosses open countryside before following New Bath Road on the outskirts of Twyford. This is a bypass, built in 1929, that deviates from the old route of the A4, and crosses the
River Loddon The River Loddon is a tributary of the River Thames in southern England. It rises at Basingstoke in Hampshire and flows northwards for to meet the Thames at Wargrave in Berkshire. Together, the Loddon and its tributaries drain an area of . Th ...
on its way into the suburbs of
Reading Reading is the process of taking in the sense or meaning of symbols, often specifically those of a written language, by means of Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifacete ...
via the village of Charvil. The A4 passes the King George's Field in
Sonning Sonning (traditional: ; modern: ) is a village and civil parish in Berkshire, England, on the River Thames, east of Reading, Berkshire, Reading. The village was described by Jerome K. Jerome in his book ''Three Men in a Boat'' as "the most fair ...
, which are used as playing fields, and the Reading Cricket and Hockey Club. As it enters Reading, along the London Road again, it crosses the junction of the A3290 next to Palmer Park, which leads to Junction 10 of the M4. The A4 goes over the intersection with the A329 Cemetery Junction which links
Wokingham Wokingham ( ) is a market town and civil parish in Berkshire, England. It is the main administrative centre of the wider Borough of Wokingham. At the 2021 census the parish had a population of 38,284 and the wider built-up area had a populati ...
with
Pangbourne Pangbourne is a village and civil parish on the River Thames in the West Berkshire unitary area of the county of Berkshire, England. Pangbourne has shops, churches, schools and a village hall. Outside its nucleated village, grouped developed are ...
, passing the Royal Berkshire Hospital and the London Road Campus of the
University of Reading The University of Reading is a public research university in Reading, Berkshire, England. It was founded in 1892 as the University Extension College, Reading, an extension college of Christchurch College, Oxford, and became University College, ...
. At London Street and again at Southampton Street, the A4 meets the A327 twice, since the latter loops round on two branches which meet at Whitley Street. Between the two junctions, the A4 becomes Crown Street for approximately 150 metres.


Reading to Newbury (16.7 miles)

On the other side of the intersection the A4 follows Pell Street and continues westward. Here it crosses the
River Kennet The Kennet is a tributary of the River Thames in Southern England. Most of the river is straddled by the North Wessex Downs AONB (Area of Outstanding Natural Beauty). The lower reaches have been made navigable as the Kennet Navigation, which â ...
, the Holy Brook and the A33 relief road, which goes towards
Basingstoke Basingstoke ( ) is a town in Hampshire, situated in south-central England across a valley at the source of the River Loddon on the western edge of the North Downs. It is the largest settlement in Hampshire without city status in the United King ...
. In West Reading, the A4 becomes Berkeley Avenue, and then the Bath Road. It passes Prospect Park, and the suburbs of Southcote, Horncastle and Calcot, before reaching Junction 12 of the M4. The A4 heads south westerly through Theale and over the roundabout connecting it to the
A340 The Airbus A340 is a long-range, wide-body passenger airliner that was developed and produced by Airbus. In the mid-1970s, Airbus conceived several derivatives of the A300, its first airliner, and developed the A340 quadjet in parallel wit ...
which heads towards Pangbourne. Heading towards
Thatcham Thatcham is a market town and civil parish in West Berkshire, England. It is situated in the valley of the River Kennet east of Newbury, Berkshire, Newbury, west of Reading, Berkshire, Reading and west of London. The town has a long history d ...
, the road passes Aldermaston Wharf next to the
Kennet and Avon Canal The Kennet and Avon Canal is a waterway in southern England with an overall length of , made up of two lengths of Navigability, navigable river linked by a canal. The name is used to refer to the entire length of the navigation rather than sol ...
and through the villages of Woolhampton and Midgham. A large industrial estate is on the left as the road enters Thatcham. At the roundabout after the industrial Estate the route follows London Road and passes Thatcham towards Benham Hill and Newbury. At the Benham Hill roundabout it goes along Bath Road where it deviates from Turnpike Road. Bath Road is the original turnpiked road and the road now confusingly called Turnpike Road was originally called The Shaw Road. The turnpike then continues along London Road as it enters the outskirts of Newbury. Heading towards the centre of Newbury, the route passes the West Berkshire Community Hospital on the right. To the North of the town centre the road becomes part of an unusual junction with the A339 that links the new A34 by-pass to the north with
Basingstoke Basingstoke ( ) is a town in Hampshire, situated in south-central England across a valley at the source of the River Loddon on the western edge of the North Downs. It is the largest settlement in Hampshire without city status in the United King ...
to the south. The junction is a combination of a figure of eight roundabout with an elevated section that used to be the old route of the A34.


Newbury to Marlborough (18.8 miles)

After the junction, the road heads out of town through Speenhamland along Western Avenue and Bath Road to the junction with the A34
Newbury bypass The Newbury bypass, officially known as The Winchester-Preston Trunk Road (A34) (Newbury Bypass), is a stretch of dual carriageway road which bypasses the town of Newbury in Berkshire, England. It is located to the west of the town and forms ...
, which was opened, after some controversy, on 17 November 1998, at a cost of £104 million. The route heads over undulating countryside in a fairly straight westward direction towards Hungerford, parallel to the
Kennet and Avon Canal The Kennet and Avon Canal is a waterway in southern England with an overall length of , made up of two lengths of Navigability, navigable river linked by a canal. The name is used to refer to the entire length of the navigation rather than sol ...
and crossing the
River Kennet The Kennet is a tributary of the River Thames in Southern England. Most of the river is straddled by the North Wessex Downs AONB (Area of Outstanding Natural Beauty). The lower reaches have been made navigable as the Kennet Navigation, which â ...
on the outskirts of the town at the same time as intersecting with the A338. The route does not enter the town centre, but continues through the northern part of town on its way to
Marlborough Marlborough or the Marlborough may refer to: Places Australia * Marlborough, Queensland * Principality of Marlborough, a short-lived micronation in 1993 * Marlborough Highway, Tasmania; Malborough was an historic name for the place at the sou ...
, via the village of Froxfield and the northern edge of
Savernake Forest Savernake Forest stands on a Cretaceous chalk plateau between Marlborough and Great Bedwyn in Wiltshire, England. Its area is approximately . Most of the forest lies within the civil parish of Savernake. It is privately owned by the Marquess o ...
. On entering the outskirts of Marlborough the road follows London Road. Crossing the River Kennet again it briefly shares the highway with the A346 which connects northwards to
Swindon Swindon () is a town in Wiltshire, England. At the time of the 2021 Census the population of the built-up area was 183,638, making it the largest settlement in the county. Located at the northeastern edge of the South West England region, Swi ...
. It splits again at a roundabout along New Road and Oxford Street into the town centre on the High Street. The High Street is a traditional main thoroughfare for an English market town, in that it is wide, with space for market stalls on either side and in the middle, though these spaces are usually marked for car parking. Until the late 1980s most of this section, and some of the following Wiltshire section, was configured as three lanes, with the central lane available for overtaking traffic in either direction. This is no longer considered safe so the road now has one wider-than-normal lane in each direction, with ghost islands at junctions to discourage overtaking at these points.


Marlborough to Chippenham (18.9 miles)

The A4 continues along the High Street on its way out of Marlborough via Bridewell Street and Bath Road. The road passes underneath a covered bridge that links Morris House of
Marlborough College Marlborough College is a Public school (United Kingdom), public school (English private boarding school) for pupils aged 13 to 18 in Marlborough, Wiltshire, England. It was founded as Marlborough School in 1843 by the Dean of Manchester, George ...
to the North Block of the same establishment. The college is an independent boarding school established in 1843 using some of the buildings that remained after the demise of the coaching trade, which saw the original Castle Inn Coaching House close. The route continues westward through the village of Fyfield, across Overton Hill where there is a parking area at the start of the Ridgeway National Trail and through the village of West Kennett. On leaving West Kennett there are some lay-bys where visitors can walk a short distance from the road to the Neolithic
West Kennet Long Barrow The West Kennet Long Barrow, also known as South Long Barrow, is a chambered long barrow near the village of Avebury in the south-western English county of Wiltshire. Probably constructed in the thirty-seventh century BC, during Britain's Early ...
, which forms part of the Avebury World Heritage Site. One mile further along the A4 is
Silbury Hill Silbury Hill is a prehistoric artificial chalk mound near Avebury in the English county of Wiltshire. It is part of the Stonehenge, Avebury and Associated Sites UNESCO World Heritage Site. At high, the hill is the second tallest prehistoric man ...
, which is also part of the Avebury World Heritage Site. A purpose built car park is located beyond the hill on the right travelling westward. As the route approaches the Beckhampton roundabout, which forms the intersection with the A361, it passes by the Waggon & Horses Inn, built in 1669 to profit from the increasing trade along the old Bath Road. It is mentioned in ''
The Pickwick Papers ''The Posthumous Papers of the Pickwick Club'' (also known as ''The Pickwick Papers'') was the Debut novel, first novel serialised from March 1836 to November 1837 by English author Charles Dickens. Because of his success with ''Sketches by Bo ...
'' by
Charles Dickens Charles John Huffam Dickens (; 7 February 1812 – 9 June 1870) was an English novelist, journalist, short story writer and Social criticism, social critic. He created some of literature's best-known fictional characters, and is regarded by ...
. The route continues past Cherhill. The Cherhill White Horse can be seen to the left, and nearby the Lansdowne Monument. The route then descends the Labour in Vain Hill through the village of Quemerford and into the market town of
Calne Calne () is a town and Civil parishes in England, civil parish in Wiltshire, southwestern England,OS Explorer Map 156, Chippenham and Bradford-on-Avon Scale: 1:25 000.Publisher: Ordnance Survey A2 edition (2007). at the northwestern extremity ...
. Heading towards the town centre, the road crosses a double mini roundabout, one exit forming the junction with the A3102 to Melksham. It follows New Road and passes by the old
coaching inn The coaching inn (also coaching house or staging inn) was a vital part of Europe's inland transport infrastructure until the development of the railway, providing a resting point ( layover) for people and horses. The inn served the needs of t ...
of the Lansdowne Strand. On the way out of Calne, the road goes along Curzon Street, and then to Chilvester Hill at the roundabout where the northern part of the A3102 splits off towards Lyneham. The A4 descends steeply before climbing again up Black Dog Hill past the
Bowood House Bowood is a Grade I listed Georgian era, Georgian English country houses, country house in Wiltshire, England, that has been owned for more than 250 years by the Fitzmaurice family. The house, with interiors by Robert Adam, stands in extensive g ...
Estate. The old road used to pass through Derry Hill, but the New Road, as it is called at this point, indicates that the village was bypassed. There follows a steep descent to the junction with the A342
Devizes Devizes () is a market town and civil parish in Wiltshire, England. It developed around Devizes Castle, an 11th-century Norman architecture, Norman castle, and received a charter in 1141. The castle was besieged during the Anarchy, a 12th-cent ...
road and a right turn past the Lysley Arms towards
Chippenham Chippenham is a market town in north-west Wiltshire, England. It lies north-east of Bath, Somerset, Bath, west of London and is near the Cotswolds Area of Outstanding Natural Beauty. The town was established on a crossing of the River Avon, ...
. On the outskirts of Chippenham is a large roundabout, where the A4 used to carry straight on down London Road and The Causeway into the town centre, which has since been pedestrianised. Most traffic turns left to go round the Pewsham Estate relief road called Pewsham Way, which is now the classified A4 route. After four roundabouts, the A4 turns left in a southerly direction at another roundabout. The route heads downhill over the River Avon on the Avenue La Fleche, named after one of Chippenham's twin towns, to the Bridge Centre roundabout.


Chippenham to Bath (12.7 miles)

The Bridge Centre roundabout forms a junction of the A4 with the A420 Bristol Road. The route heads over Rowden Hill past the Chippenham Community Hospital and down to the spot where musician
Eddie Cochran Ray Edward Cochran ( ; October 3, 1938 – April 17, 1960) was an American rock and roll musician. His songs, such as " Twenty Flight Rock", " Summertime Blues", " C'mon Everybody" and " Somethin' Else", captured teenage frustration and desire in ...
was killed in a car crash on 17 April 1960. A plaque has been placed there in remembrance. From there it passes under the railway arch built by
Isambard Kingdom Brunel Isambard Kingdom Brunel ( ; 9 April 1806 â€“ 15 September 1859) was an English civil engineer and mechanical engineer who is considered "one of the most ingenious and prolific figures in engineering history", "one of the 19th-century engi ...
in the 1830s and on to its junction with the A350. From this point onwards it regains its
trunk road A trunk road is a major highway with a specific legal classification in some jurisdictions, notably the United Kingdom, Sweden and formerly Ireland. Trunk roads are planned and managed at the national-level, distinguishing them from non-trunk ro ...
status and heads up Chequers Hill towards
Corsham Corsham is a historic market town and civil parishes in England, civil parish in west Wiltshire, England. It is at the southwestern edge of the Cotswolds, just off the A4 road (England), A4 national route. It is southwest of Swindon, east of ...
. The road passes through Pickwick, which used to be a village in its own right. Charles Dickens stayed at the Hare & Hounds Inn and used the village name for the title of his novel ''The Pickwick Papers''. After a series of roundabouts the A4 continues uphill, past what used to be the Ministry of Defence Naval Operations site at Copenacre (now a housing development) before descending steeply to the village of
Box A box (plural: boxes) is a container with rigid sides used for the storage or transportation of its contents. Most boxes have flat, parallel, rectangular sides (typically rectangular prisms). Boxes can be very small (like a matchbox) or v ...
. From the road the
Box Tunnel Box Tunnel passes through Box Hill on the Great Western Main Line (GWML) between Bath and Chippenham. The tunnel was the world's longest railway tunnel when it was completed in 1841. Built between December 1838 and June 1841 for the Great We ...
, built as part of the
Great Western Railway The Great Western Railway (GWR) was a History of rail transport in Great Britain, British railway company that linked London with the southwest, west and West Midlands (region), West Midlands of England and most of Wales. It was founded in 1833, ...
, can be seen clearly. The road bears to the right at the junction with the A365 to
Melksham Melksham () is a town and civil parish on the Bristol Avon, River Avon in Wiltshire, England, about northeast of Trowbridge and south of Chippenham. The parish population was 18,113 at the 2021 census. History Early history Excavations in ...
, and criss-crosses with the main railway line as far as the roundabout at Bathford which forms a junction with the A363 towards
Bradford-on-Avon Bradford-on-Avon (sometimes Bradford on Avon) is a town and civil parishes in England, civil parish in west Wiltshire (district), Wiltshire, England, near the border with Somerset. The town's canal, historic buildings, shops, pubs and restauran ...
. The road after this roundabout becomes a dual carriageway until the A4 diverts to the left down a slip road, and the remainder becomes the A46; this section, the £45 million dual-carriageway
Batheaston Batheaston is a village and civil parish east of the English city of Bath, on the north bank of the River Avon. The parish had a population of 2,735 in 2011. The northern area of the parish, on the road to St Catherine, is an area known as ...
/ Swainswick Bypass, opened in summer 1996, was highly controversial both at planning and at construction stages. The route enters the outskirts of Bath passing by the training grounds of Bath RFC. After a series of traffic light controlled junctions, the A4 continues straight ahead where it meets the A36. It passes Hedgemead Park and down The Paragon before crossing into George Street and to Queen Square.


Bath to Bristol/Avonmouth (19.6 miles)

In the original 1922 road numbering list, the A4 ended at the junction between George Street and Milsom Street in Bath. On 1 April 1935, it was extended over the A431 and B4044 to Newbridge, and the A36 to Avonmouth. From Queen Square, Bath, the A4 carries on to Queen Square Place and Charlotte Street, before heading along the Upper Bristol Road by Royal Victoria Park to Newbridge Road. The road crosses the River Avon on its way to join the A36 and becomes a dual carriageway again until the roundabout that forms the junction with the A39 Wells Road at the Globe Inn and exit for the nearby
Bath Spa University Bath Spa University is a public university in Bath, Somerset, Bath, England, with its main campus at Newton Park, about west of the centre of the city. The university has other campuses in the city of Bath, and one at Corsham Court in Wiltshi ...
. It continues on through the village of
Saltford Saltford is a large English village and civil parish in the Bath and North East Somerset unitary authority, Somerset. It lies between the cities of Bristol and Bath, and adjoins Keynsham on the same route. Saltford Manor House (built about 11 ...
towards
Keynsham Keynsham ( ) is a town and civil parish located on the outskirts of the city of Bristol on the A4 that links the cities of Bristol and Bath, Somerset, Bath in Somerset, England. It had a population of 19,603 at the 2021 Census. It was listed i ...
where a roundabout splits the road and the A4 continues as a dual carriageway by-passing the town, crossing over the River Chew in the process. The end of the by-pass coincides with the junction of the Avon Ring Road, the A4174. The route goes through the suburb of
Brislington Brislington is an area in the south east of the city of Bristol, England. It is on the edge of Bristol and from Bath, Somerset, Bath. Brislington Brook runs through the area in the woodlands of Nightingale Valley and St Anne's Wood. Brislingto ...
, going past Arnos Court Park and Arnos Vale Cemetery. The road runs over a bridge over the New Cut and into Temple Gate where
Bristol Temple Meads railway station Bristol Temple Meads is the oldest and largest railway station in Bristol, England. It is located away from London Paddington. It is an important transport hub for public transport in the city; there are bus services to many parts of the city ...
is located. The A4 no longer has a defined route from this point to the start of Anchor Road at The Centre; originally it went along Victoria Street and Baldwin Street before turning left onto St Augustine's Parade or, later, Broad Quay, but in more recent times it followed Redcliffe Way, via Redcliffe Roundabout (junction with the A38) across Queen Square to The Centre. From there it turns back towards
Bristol Harbour Bristol Harbour is the harbour in the city of Bristol, England. The harbour covers an area of . It is the former natural tidal river River Avon, Bristol, Avon through the city but was made into its current form in 1809 when the tide was preven ...
via Anchor Road past the We The Curious science museum. After another roundabout the A4 follows along Hotwell Road and around a one-way system that merges the A4 with the A3029. At this point the A4 regains trunk road classification and passes under the
Clifton Suspension Bridge The Clifton Suspension Bridge is a suspension bridge spanning the Avon Gorge and the River Avon, Bristol, River Avon, linking Clifton, Bristol, Clifton in Bristol to Leigh Woods, Somerset, Leigh Woods in North Somerset. Since opening in 1864, ...
along the Portway. It heads out of the city into the suburbs of Sea Mills and Shirehampton before going under the M5 to end at the roundabout that feeds the motorway, the M49 and A403 in Avonmouth.


Junction list


References


Further reading

*


External links


A4 road
at the
Society for All British and Irish Road Enthusiasts A roadgeek (from ''road'' + ''geek'') is a person involved in "roadgeeking" or "road enthusiasm", an enthusiasm for roads, fond of road trips as a hobby. One may also be called a road enthusiast, road buff, roadfan or Roads Scholar, the la ...
{{DEFAULTSORT:4-0004a Roads in England Streets in London Roads in Berkshire Roads in Bristol Roads in London Roads in Somerset Roads in Wiltshire Elevated overpasses in London Streets in the London Borough of Hammersmith and Fulham Streets in the London Borough of Hillingdon Streets in the London Borough of Hounslow Streets in the Royal Borough of Kensington and Chelsea Streets in the City of Westminster