The M25 or London Orbital Motorway is a major road encircling most of Greater London. The 117-mile (188-kilometre) motorway is one of the most important roads in the UK and one of the busiest. Margaret Thatcher opened the final section in 1986, making the M25 the longest ring road in Europe upon opening. The Dartford Crossing completes the orbital route but is not classed as motorway; it is classed as a trunk road and designated as the A282. In some cases, including notable legal contexts such as the Communications Act 2003, the M25 is used as a de facto alternative boundary for Greater London.
The Dartford–Thurrock River Crossing, commonly known as the Dartford Crossing and until 1991 the Dartford Tunnel, is a major road crossing of the River Thames in England, carrying the A282 road between Dartford in Kent in the south and Thurrock in Essex in the north.
The M1 motorway connects London to Leeds, where it joins the A1(M) near Aberford, to connect to Newcastle. It was the first inter-urban motorway to be completed in the UK; the first motorway in the country was the Preston Bypass, which later became part of the M6.
The M4, originally the London-South Wales Motorway, is a 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 element was largely complete by 1980, though a non-motorway section around Briton Ferry bridge remained until 1993. On the opening of the Second Severn Crossing in 1996, the M4 was rerouted over it.
The A1, also known as the Great North Road, is the longest numbered road in the United Kingdom, at 410 miles (660 km). It connects London, the capital of England, with Edinburgh, the capital of Scotland. The numbering system for A-roads, devised in the early 1920s, was based around patterns of roads radiating from two hubs at London and Edinburgh. The first number in the system, A1, was given to the most important part of that system: the road from London to Edinburgh, joining the two central points of the system and linking the UK's (then) two mainland capital cities. It passes through or near north London, Hatfield, Welwyn Garden City, Stevenage, Baldock, Letchworth Garden City, Biggleswade, Eaton Socon, Buckden, Peterborough, Stamford, Grantham, Newark-on-Trent, Retford, Doncaster, Pontefract, York, Wetherby, Ripon, Darlington, Durham, Gateshead, Newcastle upon Tyne, Morpeth, Alnwick and Berwick-upon-Tweed.
The M3 is a motorway in England, from Sunbury-on-Thames, Surrey, to Eastleigh, Hampshire; a distance of approximately 59 miles (95 km). The route includes the Aldershot Urban Area, Basingstoke, Winchester, and Southampton.
The M62 is a 107-mile-long (172 km) west–east trans-Pennine motorway in Northern England, connecting Liverpool and Hull via Manchester, Bradford, Leeds and Wakefield; 7 miles (11 km) of the route is shared with the M60 orbital motorway around Manchester. The road is part of the unsigned Euroroutes E20 and E22.
The A38, parts of which are known as Devon Expressway, Bristol Road and Gloucester Road, is a major A-class trunk road in England.
The M8 is the busiest motorway in Scotland. It connects the country's two largest cities, Glasgow and Edinburgh, and serves other large communities including Airdrie, Coatbridge, Greenock, Livingston and Paisley. The motorway is 60 miles (97 km) long. A major construction project to build the final section between Newhouse and Baillieston was completed on 30 April 2017. The motorway has one service station, Heart of Scotland Services, previously named Harthill due to its proximity to the village.
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 the English Channel is disrupted, such as Operation Stack and Operation Brock.
The A12 is a major road in Eastern England. It runs north-east/south-west between London and the coastal town of Lowestoft in the north-eastern corner of Suffolk, following a similar route to the Great Eastern Main Line until Ipswich. A section of the road between Lowestoft and Great Yarmouth became part of the A47 in 2017. Between the junctions with the M25 and the A14, the A12 forms part of the unsigned Euroroute E30. Unlike most A roads, this section of the A12, together with the A14 and the A55, has junction numbers as if it were a motorway.
The A63 is a major road in Yorkshire, England between Leeds and Kingston upon Hull. A section between North Cave and Hull forms the eastward continuation of the M62 motorway and is part of the unsigned Euroroute E20.
The A500 is a major primary A road in Staffordshire and Cheshire, England. It is dual carriageway for most of its length and connects Nantwich, junctions 16 and 15 of the M6 motorway with the city of Stoke-on-Trent. It is 19 miles (31 km) long.
The A64 is a major road in North and West Yorkshire, England, which links Leeds, York and Scarborough. The A64 starts as the A64(M) ring road motorway in Leeds, then towards York it becomes a high-quality dual carriageway until it is east of the city, where it becomes a single carriageway for most of its route to Scarborough.
The Severn Bridge is a motorway suspension bridge that spans the River Severn between South Gloucestershire in England and Monmouthshire in South East Wales. It is the original Severn road crossing between England and Wales, and took three and a half years to build, at a cost of £8 million. It replaced the 137-year-old Aust Ferry.
South Road and its southern section as Main South Road outside of Adelaide is a major north–south conduit connecting Adelaide and the Fleurieu Peninsula, in South Australia. It is one of Adelaide's most important arterial and bypass roads. As South Road, it is designated part of route A2 within suburban Adelaide. As Main South Road, it is designated part of routes A13 and B23.
The Almondsbury Interchange in South Gloucestershire, is one of the United Kingdom's largest motorway stack interchanges. The interchange is one of only three four-level stacks in the UK, spanning a range of 1 km by 1 km. It is the interchange for the M5 at junction 15 and M4 at junction 20, and is situated at the northern fringes of Bristol close to the village of Almondsbury, the Aztec West industrial estate, and Bradley Stoke. When it opened in 1966, it was the most complex junction on the British motorway network, a free-flowing interchange on four levels. Since then traffic volumes have increased. Additionally, at busy periods, the Interchange becomes more difficult to negotiate safely. In an attempt to ease congestion, the Interchange has become part of a smart motorway.
The Auckland Northern Motorway in the Auckland Region of New Zealand links Central Auckland and Warkworth in the former Rodney District via the Hibiscus Coast and North Shore. It is part of State Highway 1.
Dobwalls is a village and civil parish in south-east Cornwall, England, United Kingdom. It is situated 3 mi (5 km) west of Liskeard.
The Norwich Northern Distributor Road, now officially named the Broadland Northway is a 12.4 mi (20.0 km) dual-carriageway linking the A47 to the south east of the city to the proposed Rackheath Eco-town and Norwich International Airport to the north of Norwich before finishing at the A1067 Fakenham Road to the north west of the city. The road is designated the A1270, and in Spring 2018 was named the Broadland Northway.
