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Bidirectional Traffic
In transportation infrastructure, a bidirectional traffic system divides travellers into two streams of traffic that flow in opposite directions. In the design and construction of tunnels, bidirectional traffic can markedly affect ventilation considerations. Microscopic traffic flow models have been proposed for bidirectional automobile, pedestrian, and railway traffic. Bidirectional traffic can be observed in ant trails which have been researched for insight into human traffic models. In a macroscopic theory proposed by ''Laval'', the interaction between fast and slow vehicles conforms to the Newell kinematic wave model of moving bottlenecks. In air traffic control traffic is normally separated by elevation, with east bound flights at odd thousand feet elevations and west bound flights at even thousand feet elevations (1000 ft ≈ 305m). Above 28,000 ft (~8.5 km) only odd flight levels are used, with FL 290, 330, 370, etc., for eastbound flights and FL 310, 350 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drive On Left In Australia
Drive or The Drive may refer to: Motoring * Driving, the act of controlling a vehicle * Road trip, a journey on roads Roadways Roadways called "drives" may include: * Driveway, a private road for local access to structures, abbreviated "drive" * Road, an identifiable thoroughfare, route, way, or path between two places Science * Drive theory, a diverse set of motivational theories in psychology * Drive reduction theory (learning theory), a theory of learning and motivation * Prey drive, in the study of animal behavior, the predictable tendency of a carnivore to pursue and capture prey * Gene drive, in genetics, a type of bias in the inheritance of a gene Arts, entertainment, and media Films * ''Drive'' (1997 film), an action film starring Mark Dacascos * ''Drive'', a 2002 Japanese film starring Ren Osugi * ''Drive'' (2011 film), an American crime drama film starring Ryan Gosling * ''Drive'' (2019 film), an Indian romantic drama film * ''Drive'' (2024 film), a South K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Head-on Collision
A head-on collision is a traffic collision where the front ends of two vehicles such as cars, trains, ships or planes hit each other when travelling in opposite directions, as opposed to a side collision or rear-end collision. Rail transport With railways, a head-on collision occurs most often on a Single track (rail), single line railway. This usually means that at least one of the trains has Signal passed at danger, passed a signal at danger, or that a signalman has made a major error. Head-on collisions may also occur at junctions, for similar reasons. In the early days of railroading in the United States, such collisions were quite common and gave to the rise of the term "Cornfield Meet". As time progressed and signalling became more standardized, such collisions became less frequent. Even so, the term still sees some usage in the industry. The origins of the term are not well known, but it is attributed to crashes happening in rural America where farming and co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rail Infrastructure
Rail or rails may refer to: Rail transport *Rail transport and related matters *Railway track or railway lines, the running surface of a railway Arts and media Film *Rails (film), ''Rails'' (film), a 1929 Italian film by Mario Camerini *Rail (1967 film), ''Rail'' (1967 film), a film by Geoffrey Jones for British Transport Films *Rail (2024 film), ''Rail'' (2024 film), a Tamil-language film Magazines *Rail (magazine), ''Rail'' (magazine), a British rail transport periodical *Rails (magazine), ''Rails'' (magazine), a former New Zealand based rail transport periodical Other arts *The Rails, a British folk-rock band *Rail (theater) or batten, a pipe from which lighting, scenery, or curtains are hung Technology *Rails framework or Ruby on Rails, a web application framework *Rail system (firearms), a mounting system for firearm attachments *Front engine dragster *Runway alignment indicator lights, a configuration of an approach lighting system *Rule Augmented Interconnect Layout, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Public Transport By Mode
In public relations and communication science, publics are groups of individual people, and the public (a.k.a. the general public) is the totality of such groupings. This is a different concept to the sociological concept of the ''Öffentlichkeit'' or public sphere. The concept of a public has also been defined in political science, psychology, marketing, and advertising. In public relations and communication science, it is one of the more ambiguous concepts in the field. Although it has definitions in the theory of the field that have been formulated from the early 20th century onwards, and suffered more recent years from being blurred, as a result of conflation of the idea of a public with the notions of audience, market segment, community, constituency, and stakeholder. Etymology and definitions The name "public" originates with the Latin '' publicus'' (also '' poplicus''), from ''populus'', to the English word ' populace', and in general denotes some mass population ("the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedestrian Infrastructure
A pedestrian is a person traveling on foot, by wheelchair or with other mobility aids. Streets and roads often have a designated footpath for pedestrian traffic, called the ''sidewalk'' in North American English, the ''pavement'' in British English, and the ''footpath'' in Australian and New Zealand English. There are also footpaths not associated with thoroughfares; these include rural paths and urban short cuts. Historically, walking has been the main way people get around. In the early use of the word, ''pedestrian'' meant a "professional walker", or somebody who held a record for speed or endurance. With the advent of cars, it started to be used as an opposite: somebody who is not riding or driving. As walking is a healthy and sustainable mode of transport, there are efforts to make cities more walkable. For instance, by creating wider sidewalks, a pedestrian network, or restricting motor vehicles in city centres. Pedestrians are vulnerable and can be injured, for examp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chirality
Chirality () is a property of asymmetry important in several branches of science. The word ''chirality'' is derived from the Greek (''kheir''), "hand", a familiar chiral object. An object or a system is ''chiral'' if it is distinguishable from its mirror image; that is, it cannot be superposed (not to be confused with superimposed) onto it. Conversely, a mirror image of an ''achiral'' object, such as a sphere, cannot be distinguished from the object. A chiral object and its mirror image are called '' enantiomorphs'' (Greek, "opposite forms") or, when referring to molecules, ''enantiomers''. A non-chiral object is called ''achiral'' (sometimes also ''amphichiral'') and can be superposed on its mirror image. The term was first used by Lord Kelvin in 1893 in the second Robert Boyle Lecture at the Oxford University Junior Scientific Club which was published in 1894: Human hands are perhaps the most recognized example of chirality. The left hand is a non-superposable mirror ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Traffic Control
Air traffic control (ATC) is a service provided by ground-based air traffic controllers who direct aircraft on the ground and through a given section of controlled airspace, and can provide advisory services to aircraft in non-controlled airspace. The primary purpose of ATC is to prevent collisions, organise and expedite the flow of traffic in the air, and provide information and other support for pilots. Personnel of air traffic control monitor aircraft location in their assigned airspace by radar and communicate with the pilots by radio. To prevent collisions, ATC enforces Separation (air traffic control), traffic separation rules, which ensure each aircraft maintains a minimum amount of 'empty space' around it at all times. It is also common for ATC to provide services to all General aviation, private, Military aviation, military, and commercial aircraft operating within its airspace; not just civilian aircraft. Depending on the type of flight and the class of airspace, AT ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trails
A trail, also known as a path or track, is an unpaved lane or a small paved road (though it can also be a route along a navigable waterways) generally not intended for usage by motorized vehicles, usually passing through a natural area. However, it is sometimes applied to highways in North America. In the United Kingdom and Ireland, a path or footpath is the preferred term for a pedestrian or hiking trail. In the US, the term was historically used for a route into or through wild territory used by explorers and migrants (e.g. the Oregon Trail). In the United States, "trace" is a synonym for trail, as in Natchez Trace. Some trails are restricted to use by only walkers, or cyclists, or equestrians, or for snowshoeing, or cross-country skiing, others, for example bridleways in the UK, are shared, and can be used by walkers, cyclists and equestrians. Although most ban motorized use, there are unpaved trails used by dirt bikes, quad bikes and other off-road vehicles, u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rear-end Collision
A rear-end collision, often called rear-ending or, in the UK, a shunt, occurs when a forward-moving vehicle crashes into the back of another vehicle (often stationary) in front of it. Similarly, rear-end classification of railway accidents, rail collisions occur when a train runs into the end of a preceding train on the same railway track, track. Common factors contributing to rear-end collisions include driver inattention or distraction, tailgating, panic stops, brake checking and reduced traction due to wet weather or road surface#Surface deterioration, worn pavement. According to the National Highway Safety Administration (NHTSA), rear-end collisions account for 7.5% of fatal automobile collisions. However, they account for 29% of all automobile accidents, making them one of the most frequent types of automobile accidents in the United States. According to NHTSA in 2020, out of 419,400 people involved in rear-end crashes, less than 1% were killed and over 99% were injured. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traffic Collision
A traffic collision, also known as a motor vehicle collision, or car crash, occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other moving or stationary obstruction, such as a tree, pole or building. Traffic collisions often result in injury, disability, death, and property damage as well as financial costs to both society and the individuals involved. Road transport is statistically the most dangerous situation people deal with on a daily basis, but casualty figures from such incidents attract less media attention than other, less frequent types of tragedy. The commonly used term car accident is increasingly falling out of favor with many government departments and organizations: the Associated Press style guide recommends caution before using the term and the National Union of Journalists advises against it in their Road Collision Reporting Guidelines. Some collisions are intentional vehicle-ramming attacks, staged crashes, vehicu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microscopic Traffic Flow Model
Microscopic traffic flow models are a class of scientific models of vehicular traffic dynamics. In contrast, to macroscopic models, microscopic traffic flow models simulate single vehicle-driver units, so the dynamic variables of the models represent microscopic properties like the position and velocity of single vehicles. Car-following models Also known as ''time-continuous models'', all car-following models have in common that they are defined by ordinary differential equations describing the complete dynamics of the vehicles' positions x_\alpha and velocities v_\alpha. It is assumed that the input stimuli of the drivers are restricted to their own velocity v_\alpha, the net distance (bumper-to-bumper distance) s_\alpha = x_ - x_\alpha - \ell_ to the leading vehicle \alpha-1 (where \ell_ denotes the vehicle length), and the velocity v_ of the leading vehicle. The equation of motion of each vehicle is characterized by an acceleration function that depends on those input stimuli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
One-way Traffic
One-way traffic (or uni-directional traffic) is traffic that moves in a single direction. A one-way street is a street either facilitating only one-way traffic, or designed to direct vehicles to move in one direction. One-way streets typically result in higher traffic flow as drivers may avoid encountering oncoming traffic or turns through oncoming traffic. Residents may dislike one-way streets due to the circuitous route required to get to a specific destination, and the potential for higher speeds adversely affecting pedestrian safety. Some studies even challenge the original motivation for one-way streets, in that the circuitous routes negate the claimed higher speeds. Signage General signs Signs are posted showing which direction the vehicles can move in: commonly an upward arrow, or on a T junction where the main road is one-way, an arrow to the left or right. At the end of the street through which vehicles may not enter, a prohibitory traffic sign "Do Not Enter", "Wr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
