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Protective Bollard
Traffic bollards are short, pillar-like objects used to obstruct roads for traffic control and pedestrian safety. Bollards work by limiting movements and controlling traffic speed by narrowing the available space. Permanent bollards can be used for traffic control or guarding against vehicle-ramming attacks. They may be mounted near enough to each other that they block ordinary cars/trucks, for instance, but spaced widely enough to permit special-purpose vehicles, bicycles, and pedestrians to pass through. Bollards may also be used to enclose car-free zones. Bollards and other street furniture can also be used to control overspill parking onto sidewalks and verges. History Wooden posts were used for basic traffic management from at least the second half of the 17th century. One early well-documented case is that of the "postes and rales in ye King's highway for ye (safety) of all foot passengers" erected in 1671 in the High Street of Old Brentford, Middlesex (part of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traffic
Traffic is the movement of vehicles and pedestrians along land routes. Traffic laws govern and regulate traffic, while rules of the road include traffic laws and informal rules that may have developed over time to facilitate the orderly and timely flow of traffic. Organized traffic generally has well-established priorities, lanes, right-of-way, and traffic control at intersections. ( International Regulations for Preventing Collisions at Sea govern the oceans and influence some laws for navigating domestic waters.) Traffic is formally organized in many jurisdictions, with marked lanes, junctions, intersections, interchanges, traffic signals, cones, or signs. Traffic is often classified by type: heavy motor vehicle (e.g., car, truck), other vehicle (e.g., moped, bicycle), and pedestrian. Different classes may share speed limits and easement, or may be segregated. Some jurisdictions may have very detailed and complex rules of the road while others rely more on drive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bollards2742Canthusus
A bollard is a sturdy, short, vertical post. The term originally referred to a post on a ship or quay used principally for mooring boats. In modern usage, it also refers to posts installed to control road traffic and posts designed to prevent automotive vehicles from colliding with pedestrians and structures. Etymology The term is probably related to bole, meaning a tree trunk. The earliest citation given by the ''Oxford English Dictionary'' (referring to a maritime bollard) dates from 1844, although a reference in the '' Caledonian Mercury'' in 1817 describes bollards as huge posts. History Wooden posts were used for basic traffic management from at least the second half of the 17th century. One early well-documented case is that of the "postes and rales in ye King's highway for ye (safety) of all foot passengers" erected in 1671 in the High Street of Old Brentford, Middlesex (part of the London–Bath road). Another is that of "two oak-posts" set up next to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Bar Association
The American Bar Association (ABA) is a voluntary association, voluntary bar association of lawyers and law students in the United States; national in scope, it is not specific to any single jurisdiction. Founded in 1878, the ABA's stated activities are the setting of academic standards for law schools, and the formulation of model ethical codes related to the legal profession. As of fiscal year 2017, the ABA had 194,000 dues-paying members, constituting approximately 24.4% of American attorneys. In 1979, half of all lawyers in the U.S. were members of the ABA. In 2016, about one third of the 1.3 million practicing lawyers in the U.S. were included in the ABA membership of 400,000, with figures largely unchanged in 2024. The organization's national headquarters are in Chicago, Illinois, with a branch office in Washington, D.C.. The association is affiliated with the law, legal, and professional research sponsoring organization the American Bar Foundation. History The ABA wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elastomer
An elastomer is a polymer with viscoelasticity (i.e. both viscosity and elasticity) and with weak intermolecular forces, generally low Young's modulus (E) and high failure strain compared with other materials. The term, a portmanteau of ''elastic polymer'', is often used interchangeably with ''rubber'', although the latter is preferred when referring to vulcanisates. Each of the monomers which link to form the polymer is usually a compound of several elements among carbon, hydrogen, oxygen and silicon. Elastomers are amorphous polymers maintained above their glass transition temperature, so that considerable molecular reconformation is feasible without breaking of covalent bonds. Rubber-like solids with elastic properties are called elastomers. Polymer chains are held together in these materials by relatively weak intermolecular bonds, which permit the polymers to stretch in response to macroscopic stresses. Elastomers are usually thermosets (requiring vulcanization ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2025 New Orleans Truck Attack
On January 1, 2025, at around 3:15 a.m. Central Time Zone, CST (UTC−06:00, UTC–6), Shamsud-Din Jabbar, a 42-year-old American man, Vehicle-ramming attack, drove a pickup truck into a crowd on Bourbon Street in New Orleans, Louisiana, United States, then exited the truck and engaged in a shootout with police before being fatally shot. Fourteen victims were killed, plus the perpetrator, and at least fifty-seven others were injured, including two police officers who were shot. The attack occurred during New Year's Day, New Year celebrations in the city, which was scheduled to host the 2025 Sugar Bowl later that day. The assailant, Shamsud-Din Jabbar, was an American-born resident of Houston, Texas. An Islamic State (ISIS) flag was found in the truck. The Federal Bureau of Investigation (FBI) determined that Jabbar had been inspired by ISIS. It investigated the matter as domestic terrorism, since there was no evidence of any foreign direction behind the attack. Jabbar, who ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archer Barrier
Archery is the sport, practice, or skill of using a bow to shoot arrows.Paterson ''Encyclopaedia of Archery'' p. 17 The word comes from the Latin ''arcus'', meaning bow. Historically, archery has been used for hunting and combat. In modern times, it is mainly a competitive sport and recreational activity. A person who practices archery is typically called an archer, bowman, or toxophilite. History Origins and ancient archery The oldest known evidence of arrows (not found with surviving bows) comes from South African sites such as Sibudu Cave, where the remains of bone and stone arrowheads have been found dating approximately 72,000 to 60,000 years ago.Backwell L, d'Errico F, Wadley L.(2008). Middle Stone Age bone tools from the Howiesons Poort layers, Sibudu Cave, South Africa. Journal of Archaeological Science, 35:1566–1580. Backwell L, Bradfield J, Carlson KJ, Jashashvili T, Wadley L, d'Errico F.(2018). The antiquity of bow-and-arrow technology: evidence from Middle St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wedge Barrier
A wedge is a triangular shaped tool, a portable inclined plane, and one of the six simple machines. It can be used to separate two objects or portions of an object, lift up an object, or hold an object in place. It functions by converting a force applied to its blunt end into forces perpendicular ( normal) to its inclined surfaces. The mechanical advantage of a wedge is given by the ratio of the length of its slope to its width..''McGraw-Hill Concise Encyclopedia of Science & Technology'', Third Ed., Sybil P. Parker, ed., McGraw-Hill, Inc., 1992, p. 2041. Although a short wedge with a wide angle may do a job faster, it requires more force than a long wedge with a narrow angle. The force is applied on a flat, broad surface. This energy is transported to the pointy, sharp end of the wedge, hence the force is transported. The wedge simply transports energy in the form of friction and collects it to the pointy end, consequently breaking the item. History Wedges have existed for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Car Ramming Attack
A vehicle-ramming attack, also known as a vehicle as a weapon or VAW attack, is an assault in which a perpetrator deliberately rams a vehicle into a building, people, or another vehicle. According to Stratfor Global Intelligence analysts, this attack represents a relatively new militant tactic that could prove more difficult to prevent than suicide bombings. Deliberate vehicle-ramming into a crowd of people is a tactic used by terrorists, becoming a major terrorist tactic in the 2010s because it requires little skill to perpetrate, cars and trucks are widely available, and it has the potential to cause significant casualties. Deliberate vehicle-ramming has also been carried out in the course of other types of crimes, including road rage incidents. Deliberate vehicle-ramming incidents have also sometimes been ascribed to the driver's psychiatric disorder.Alan R. Felthouse,Personal Violence in ''The American Psychiatric Publishing Textbook of Forensic Psychiatry'' (2d ed.: eds. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Security Bollard-planter In Washington, D
Security is protection from, or resilience against, potential harm (or other unwanted coercion). Beneficiaries (technically referents) of security may be persons and social groups, objects and institutions, ecosystems, or any other entity or phenomenon vulnerable to unwanted change. Security mostly refers to protection from hostile forces, but it has a wide range of other senses: for example, as the absence of harm (e.g., freedom from want); as the presence of an essential good (e.g., food security); as resilience against potential damage or harm (e.g. secure foundations); as secrecy (e.g., a secure telephone line); as containment (e.g., a secure room or cell); and as a state of mind (e.g., emotional security). Security is both a feeling and a state of reality. One might feel secure when one is not actually so; or might feel insecure despite being safe. This distinction is usually not very clear to express in the English language. The term is also used to refer to acts and sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
