A roundabout is a type of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is given to traffic already on the junction.
The M4, a motorway in the United Kingdom running from west London to southwest Wales, was originally referred to as the London-South Wales Motorway. The English section to the Severn Bridge was constructed between 1961 and 1971; the Welsh element was completed in 1993. The Second Severn Crossing officially renamed the Prince of Wales Bridge, was inaugurated on 5 June 1996 by HRH The Prince of Wales and the M4 was rerouted. Apart from its two spurs—the A48(M) and the M48—the M4 is the only motorway in Wales.
The A14 is a trunk road in England, running 127 miles (204 km) from the Port of Felixstowe, Suffolk to its western end at the Catthorpe Interchange; a major intersection at the southern end of the M6 and junction 19 of the M1 in Leicestershire. The road forms part of the unsigned Euroroutes E24 and E30.
The A15 is a major road in England. It runs north from Peterborough via Market Deeping, Bourne, Sleaford and Lincoln along a variety of ancient, Roman, and Turnpike alignments before it is interrupted at its junction with the M180 near Scawby. The road restarts 10 miles (16 km) east, and then continues north past Barton-upon-Humber, crossing the Humber on the Humber Bridge before terminating at Hessle near Kingston upon Hull.
The M10 was a motorway in Hertfordshire, England, running for approximately 3 miles from the M1 motorway at junction 7 near Hemel Hempstead to the A414 North Orbital Road at Park Street Roundabout, just south of St Albans. Opened in 1959, it was reclassified as part of the A414 in 2009.
Western Avenue, some 10 miles (16 km) in length, is one of the major roads leading out of London, England. It is part of the A40, leaving the city in a north-westerly direction. The A40 is named as Western Avenue from its junction with Old Oak Common Lane in East Acton; the junction now has traffic lights, but its name, Savoy Circus, commemorates the roundabout which once formed the junction. East of this point is Westway, part of the A40 Central London link from Paddington.
The A127, also known as the Southend Arterial Road, is a major road in Essex, England. It was constructed as a new arterial road project in the 1920s, linking Romford with Southend-on-Sea, replacing the older A13. Formerly classified as a trunk road, it was "de-trunked" in 1997. It is known as the Southend Arterial Road except for part of its length in Southend-on-Sea. It is also streetlit for its whole length despite its majority coverage through rural land.
The M606 is a short stretch of motorway in West Yorkshire, England. Called the Bradford Spur motorway, the M606 leaves the M62 motorway at junction 26, near Cleckheaton, and heads into Bradford, to join the A6177 Bradford Ring Road. It is officially named the "Bradford South Radial Motorway" and was opened in 1973.
The A453 road was formerly the main trunk road connecting the English cities of Nottingham and Birmingham. However, the middle section of this mainly single-carriageway road has largely been downgraded to B roads or unclassified roads following the construction of the parallel M42-A42 link around 1990. The M42 was originally meant to pass further north than it does, and to join the M1 at Sandiacre in Derbyshire. The M42/A42 does not enter Derbyshire, but instead joins the M1 closer to the A453 junction at Kegworth. The A42 shadows the former A453 from Appleby Magna to Castle Donington. The road historically connected the East Midlands with the West Midlands.
The A316, known in parts as the Great Chertsey Road, is a major road in England, which runs from the A315 Chiswick High Road, Turnham Green, Chiswick to join head-on the M3 motorway at Sunbury-on-Thames. Its initial London section Chiswick Lane heads south — following this it is a mostly straight dual carriageway aligned WSW.
The A54 road is a road in England linking Chester in Cheshire with Buxton in Derbyshire. Its route through both urban and steep rural areas presents a challenge to Cheshire County Council in maintaining the safety of the road. Many years ago it was the main East-West Route in Cheshire The importance of the A54 through Middlewich and Winsford was decreased in the 1970s/1980s with the building of the M56 and dualling of the A556 at Northwich. The Section through Winsford carries approximately 30,000 vehicles per day.
The A4174 is a major ring road in England which runs around the northern and eastern edge of Bristol, mainly in South Gloucestershire, and through the southern suburbs of the city. When it was first conceived it was planned to circle the whole of Bristol, and is commonly referred to as the "Avon Ring Road", or less accurately the "Bristol Ring Road", on road signs. The road does not circle the whole city, instead covering roughly half of the route. It is broken in part where it is concurrent with the A4.
The A2212 road is a 4-digit, non-primary A road in southeast London, England; it is 5.7 km (3.5 mi) long and runs in a north to south direction from Lee Green, to Bromley passing through Grove Park, Downham, Plaistow and Sundridge. Bromley is the only one of these places which is a primary destination.
The A4119 links Tonypandy with Cardiff in South Wales.
The Greenstead roundabout is a large roundabout junction in Colchester, Essex.
A roundabout interchange is a type of interchange between a controlled access highway, such as a motorway or freeway, and a minor road. The slip roads to and from the motorway carriageways converge at a single roundabout, which is grade-separated from the motorway lanes with bridges.
The A607 is an A road in England that starts in Leicester and heads northeastwards through Leicestershire and the town of Grantham, Lincolnshire, terminating at Bracebridge Heath, a village on the outskirts of Lincoln. It is a primary route from Thurmaston to the A1 junction at Grantham.
The A40 is a major trunk road connecting London to Fishguard, Wales. The A40 in London passes through seven London Boroughs: the City of London, Camden, Westminster, Kensington & Chelsea, Hammersmith & Fulham, Ealing and Hillingdon, to meet the M40 motorway junction 1 at Denham, Buckinghamshire.
Chesterton Road is a road in the north of Cambridge, England. The southwestern part of the road is known as Chesterton Lane. This links with Northampton Street at the junction with Castle Street to the northwest and Magdalene Street leading southeast across the River Cam into central Cambridge. At the northeastern end there is a roundabout, linking with Elizabeth Way to the south, continuing Cambridge's inner ring road to the east. Halfway along Chesterton Road there is a major junction with Victoria Road northwest and Milton Road northeast and Victoria Avenue over the Cam on Victoria Avenue Bridge to the south. Chesterton Lane and Chesterton Road form the northern part of the Cambridge inner ring road and thus have heavy traffic at times.
