The A1 is the longest numbered road in the UK, at 396 miles (637 km). It connects London, the capital of England, with Edinburgh, the capital of Scotland. It passes through or near North London, Hatfield, Welwyn Garden City, Stevenage, Baldock, Letchworth Garden City, Biggleswade, St Neots, Huntingdon, Peterborough, Stamford, Grantham, Newark-on-Trent, Retford, Doncaster, York, Pontefract, Wetherby, Ripon, Darlington, Durham, Sunderland, Gateshead, Newcastle upon Tyne, Morpeth, Alnwick and Berwick-upon-Tweed.
The M50 motorway is a C-shaped orbital motorway in Dublin and the busiest motorway in Ireland. The current route was built in various sections over the course of 27 years, from 1983 to 2010. It begins at Dublin Port, running northward through the Dublin Port Tunnel and along a portion of the Airport Motorway. It then turns west at its junction with the M1, circling the northern, western and southern suburbs of Dublin, before merging with the M11 at Shankill in South East Dublin. The road forms part of European route E01.
The M1 motorway is a motorway in Ireland. It forms the large majority of the N1 national primary road connecting Dublin towards Belfast along the east of the island of Ireland. The route heads north via Swords, Drogheda and Dundalk to the Northern Irish border just south of Newry in County Armagh, where it joins the A1 road and further on, the M1 motorway in Northern Ireland. It also forms a significant part of the road connection between Dublin and the Northern Irish cities of Newry, and Lisburn. The route is part of European route E01.
The N11 road is a national primary road in Ireland, running for 129 km (80 mi) along the east side of Ireland from Dublin to Wexford. It passes close to Bray, Greystones, Wicklow, Arklow, Gorey, and Enniscorthy. Beyond Wexford, the route continues to Rosslare as the N25. The road forms part of European route E01. As of July 2019 the N11/M11 is of dual carriageway or motorway standard from Dublin as far as Oilgate in County Wexford.
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.
National Development Plan was the title given by the Irish Government to a scheme of organised large-scale expenditure on (mainly) national infrastructure. The first five-year plan ran from 1988 to 1993, the second was a six-year plan from 1994 to 1999 and the third ran as a seven-year plan from 2000 to 2006. A fourth National Development Plan ran from 2007 to 2011. The main elements of the third plan were the development of a national motorway network between the major cities in Ireland. The upgrading of the rail network was a secondary scheme.
A dual carriageway (BE) or divided highway (AE) is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are designed to higher standards with controlled access are generally classed as motorways, freeways, etc., rather than dual carriageways.
The Falls Road is the main road through West Belfast, Northern Ireland, running from Divis Street in Belfast City Centre to Andersonstown in the suburbs. The name has been synonymous for at least a century and a half with the Catholic community in the city. The road is usually referred to as the Falls Road, rather than as Falls Road. It is known in Irish as the Bóthar na bhFál and as the Faas Raa in Ulster-Scots.
The M1 is a motorway in Northern Ireland. It is the longest motorway in Northern Ireland and runs for 38 miles (61 km) from Belfast to Dungannon through County Antrim, County Down, County Armagh and County Tyrone. It forms part of the route via the A1 in Northern Ireland between Belfast and Dublin as well as being a part of the unsigned European E01 and E18 routes.
The M2 is a motorway in Belfast and County Antrim in Northern Ireland. It is in two sections, the southern section running from north Belfast to Antrim and the northern section acts as a bypass of Ballymena, with the A26 road linking the two sections. In total it is 22 miles (36.2 kilometres). The M2 has the busiest sections of any road or motorway in Northern Ireland. The M2 is one of Northern Ireland's most important motorways, forming most of the main route from Belfast city to both Belfast International Airport and less than a quarter of the way to Derry. It forms part of the unsigned European route E01, E16 and E18 roads.
In the field of road transport, an interchange or a grade-separated junction is a road junction that uses grade separations to allow for the movement of traffic between two or more roadways or highways, using a system of interconnecting roadways to permit traffic on at least one of the routes to pass through the junction without interruption from crossing traffic streams. It differs from a standard intersection, where roads cross at grade. Interchanges are almost always used when at least one road is a controlled-access highway or a limited-access divided highway (expressway), though they are sometimes used at junctions between surface streets.
The M3 is an urban motorway 0.8 miles (1.3 km) in length owned by Siac Construction and Cintra, S.A. that connects the M2 in north Belfast, Northern Ireland to the A2 Sydenham Bypass in east Belfast. It is the shortest motorway in Northern Ireland, and one of the busiest, carrying 60,000 vehicles per day as of 2005. It has a permanent speed limit of 50 mph (80 km/h).
The M5 is a spur motorway of 1.4 miles (2.3 km) length in north Belfast, Northern Ireland. It connects the M2 to the A2 Shore Road at Hazelbank in Newtownabbey. It is a dual two lane road with most of the road on a causeway in Belfast Lough in order to bypass Whitehouse beach.
The A6 road in Northern Ireland runs for 71.4 miles (114.9 km) from Belfast to Derry, via County Antrim and County Londonderry. From Belfast to Randalstown the route has been superseded by a motorway. Mostly single carriageway, there are sections of dual carriageway in Antrim town centre and from Randalstown to Toome, including the Toome bypass. In urban and suburban districts of Belfast and Derry the route is single carriageway with 4 lanes. In rural parts, there are numerous climbing lanes along the route. The A6 is one of Northern Ireland's most important arterial routes, as the road runs between its two largest cities and urban areas. Between Randalstown and Derry the road forms part of European route E16.
Transportation systems in the city of Belfast, Northern Ireland include road, air, rail, and sea. It is still a relatively car dependent city however it is also served by a comprehensive rail and bus network. Belfast also ran electric trams prior to 1954. The city has two major airports and the Port of Belfast is the busiest ferry port on the island of Ireland.
The Comber Greenway is a 7-mile (11 km) traffic-free section of the National Cycle Network that runs along the old Belfast-Comber railway line. The cycle path starts on Dee Street in east Belfast and finishes at Comber in County Down. As well as a cycling path, it is also popular with people on foot. The most recent addition to the route was in November 2008 when the final link between Old Dundonald Road/Comber Rd junction and Comber was opened. This added 1.6 miles (2.6 km) to the route. One section runs through a SLNCI-designated Wetland ecosystem.
The A8 in Northern Ireland is a 26.1 km route connecting the city of Belfast with the harbour town of Larne. One of the busiest routes in the region, the road forms part of the unsigned European routes E01 and E18.
The Sir Roden Cutler VC Memorial Interchange often shortened to Roden Cutler Interchange is a three-level motorway interchange located in Prestons in South-West Sydney. The interchange forms the junction of the Westlink M7 and M5 South-West Motorway with the M31 Hume Motorway, opening to traffic in December 2005 along with the M7. It is a major urban feature of the National Highway network with roads linking Sydney south to Canberra and Melbourne and north to Newcastle and Brisbane converging at the interchange.
The Belfast Urban Motorway was a proposed motorway system in Belfast, Northern Ireland announced in 1964, but was never completed, only the Western portion was built as the A12, Westlink. It was to be built in three phases: Phase 1, from the M1 at Broadway to the M2 at York Street; Phase 2, from the M2 at York Street across the River Lagan to the M3 at the bottom of the Newtownards Road; and Phase 3, from the Newtownards Road south through Short Strand, back across the River Lagan, through Shaftesbury Square to join the start at the M1.
E01 and 
E18 
M2 Junction 1a
M3 
M1 Junction 1
