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Single Carriageway
A single carriageway (British English) is a road with one, two or more lanes arranged within a one carriageway with no central reservation, central reservation/median strip to separate opposing flows of traffic. A single-track road is a type of single carriageway with a single lane with passing places for traffic in both directions. An undivided highway (American English) is the term used for motorways with two or more lanes with no central reservation/median strip. Road traffic safety is generally worse for high-speed single carriageways than for dual carriageways due to the lack of separation between traffic moving in opposing directions. Countries Ireland The term ''single carriageway'' is used for roads in Republic of Ireland, Ireland. Road speed limits in the Republic of Ireland, Speed limits on single-carriageway roads vary depending on their classification: national primary roads and national secondary roads have a general speed limit of , while Regional road (Ireland), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regional Road (Ireland)
A regional road () in the Republic of Ireland is a class of road not forming a major route (such as a national primary road or national secondary road), but nevertheless forming a link in the Roads in Ireland, national route network. There are over 11,600 kilometres (7,200 miles) of regional roads. Regional roads are numbered with three-digit route numbers, prefixed by "R" (e.g. R105 road (Ireland), R105). The equivalent road category in Northern Ireland are Roads in Northern Ireland#"B" roads, B roads. History Until 1977, classified roads in the Republic of Ireland were designated with one of two prefixes: Trunk roads in Ireland, "T" for trunk roads and "L" for link roads. The ''Local Government (Roads and Motorways) Act, 1974'' authorised the designation of roads as national roads: in 1977, twenty-five national primary roads (N1-N25) and thirty-three national secondary roads (N51-N83) were initially designated under the ''Local Government (Roads and Motorways) Act, 1974 (Declar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roads In The Republic Of Ireland
A road is a thoroughfare used primarily for movement of traffic. Roads differ from streets, whose primary use is local access. They also differ from stroads, which combine the features of streets and roads. Most modern roads are paved. The words "road" and "street" are commonly considered to be interchangeable, but the distinction is important in urban design. There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, and local roads. The primary features of roads include lanes, sidewalks (pavement), roadways (carriageways), medians, shoulders, verges, bike paths (cycle paths), and shared-use paths. Definitions Historically, many roads were simply recognizable routes without any formal construction or some maintenance. The Organization for Economic Co-operation and Development (OECD) defines a road as "a line of communication (travelled way) using a stabilized base oth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roads In The United Kingdom
The United Kingdom has a well developed and extensive network of roads totalling about . Road distances are shown in miles or yards and UK speed limits are indicated in miles per hour (mph) or by the use of the national speed limit (NSL) symbol. Some vehicle categories have various lower maximum limits enforced by speed limiters. 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. The earliest specifically engineered roads were built during the prehistoric British Iron Age. The road network was expanded during the Roman occupation. Some of these roads still remain to this day. New roads were added in the Middle Ages and from the 17th century onwards. Whilst control has been transferred between local and central bodies, current management and development of the road network is shared between local authorities, the devolved administrations of Scotland, Wales and Northern Ire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carriageway
A carriageway (British English) or roadway (North American English) is a width of road on which a vehicle is not restricted by any physical barriers or separation to move laterally. A carriageway generally consists of a number of traffic lanes together with any associated shoulder, but may be a sole lane in width (for example, a highway offramp). Description A single carriageway road (North American English: undivided highway) has one carriageway with 1, 2 or more lanes together with any associated footways (North American English: sidewalk) and road verges (North American English: tree belt, parkway, or other regional variants). A dual carriageway road (North American English: divided highway) has two roadways separated by a central reservation (North American English: median). A local-express lane system (also called collector-express or collector-distributor) has more than two roadways, typically two sets of 'local lanes' or 'collector lanes' and also two sets of 'expre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overtaking
Overtaking or passing is the act of one vehicle going past another slower moving vehicle, travelling in the same direction, on a road. The lane used for overtaking another vehicle is often a passing lane farther from the road shoulder, which is to the left in places that drive on the right and to the right in places that drive on the left. Rules of overtaking In English-speaking countries On a single carriageway, single-carriageway/undivided-highway road, the lane used for overtaking is often the same lane that is used by oncoming traffic. An overtaking vehicle must be able to see clearly ahead of them for the entire overtaking manoeuvre plus a margin of error. For example, in New Zealand it's instructed in the Road Code that an overtaking driver must be able to see at least of clear road in front of them as they finish the passing manoeuvre. In the UK, guidance for passing and overtaking is given in rules 162-169 of the Highway Code. In some jurisdictions, the "overtaking ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manual On Uniform Traffic Control Devices
The ''Manual on Uniform Traffic Control Devices for Streets and Highways'' (usually referred to as the ''Manual on Uniform Traffic Control Devices'', abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed, and used. Federal law requires compliance by all traffic control signs and surface markings on roads "open to public travel", including state, local, and privately owned roads (but not parking lots or gated communities). While some state agencies have developed their own sets of standards, including their own MUTCDs, these must substantially conform to the federal MUTCD. The MUTCD defines the content and placement of traffic signs, while design specifications are detailed in a companion volume, ''Standard Highway Signs and Markings''. This manual defines the specific dimensions, colo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traffic Flow
In transportation engineering, traffic flow is the study of interactions between travellers (including pedestrians, cyclists, drivers, and their vehicles) and infrastructure (including highways, signage, and traffic control devices), with the aim of understanding and developing an optimal transport network with efficient movement of traffic and minimal traffic congestion problems. The foundation for modern traffic flow analysis dates back to the 1920s with Frank Knight's analysis of traffic equilibrium, further developed by John Glen Wardrop, Wardrop in 1952. Despite advances in computing, a universally satisfactory theory applicable to real-world conditions remains elusive. Current models blend empirical and theoretical techniques to forecast traffic and identify congestion areas, considering variables like vehicle use and land changes. Traffic flow is influenced by the Complex system, complex interactions of vehicles, displaying behaviors such as cluster formation and shock wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A38(M)
The A38(M), commonly known as the Aston Expressway, is a motorway in Birmingham, England. It is long and was opened on 24 May 1972.The Motorway Archive A38(M) – Dates It connects the to and Central Birmingham and forms part of the much longer A38 route. It is extremely unusual as it is the only single carriageway motorway in the United Kingdom and consists of seven lanes with no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Built-up Area (Highway Code)
In the UK Highway Code for England, Scotland and Northern Ireland, a built-up area is a settled area in which the speed limit of a road is automatically 30 mph (48 km/h). In Wales, it is 20 mph (32 km/h). These roads are known as 'restricted roads' and are identified by the presence of street lights. History In 1930, the concept of specific regulation for roads within built-up areas appears. It defines the road as a road within built-up area if some system of street lighting exists at less than 200 yards (183 meters) from that road, unless decided other way by the local authority and written on traffic signs. The Road Traffic Regulation Act 1984 is the basis of the current law. In 2018, mainland UK became a member of the Vienna convention on road traffic which consider that the concept of built-up area should be defined by the domestic legislation. Legal definition In August 2006, the Department for Transport issued new guidance relating to speed lim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Speed Limits In The United Kingdom
Road speed limits in the United Kingdom are used to define the maximum legal speed limit, speed (which may be variable) for vehicles using Roads in the United Kingdom, public roads in the UK. Speed limits are one of the measures available to attempt to control traffic speeds, reduce negative environmental effects of traffic, increase fuel use efficiency and satisfy local community wishes. The speed limit in each location is indicated on a nearby traffic sign or by the presence of street lighting. Signs show speed limits in miles per hour (mph) or the national speed limit (NSL) sign may be used. The national speed limit is 70 mph (112 km/h) on motorways and dual carriageways, 60 mph (96 km/h) on single carriageways and generally ( in Wales) in areas with street lighting (Built-up area (Highway Code), built-up area). These limits may be changed by road signs and apply to cars, motorcycles, car-derived vans up to 2 tonnes maximum laden weight (MLW), and to moto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
