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Road Surface Marking
Road surface marking is any kind of device or material that is used on a road surface in order to convey official information; they are commonly placed with road marking machines (also referred to as road marking equipment or pavement marking equipment). They can also be applied in other facilities used by vehicles to mark parking spaces or designate areas for other uses. In some countries and areas (France, Italy, Czech Republic, Slovakia etc.), road markings are conceived as horizontal traffic signs, as opposed to vertical traffic signs placed on posts. Road surface markings are used on paved roadways to provide guidance and information to drivers and pedestrians. Uniformity of the markings is an important factor in minimising confusion and uncertainty about their meaning, and efforts exist to standardise such markings across borders. However, countries and areas categorise and specify road surface markings in different ways—white lines are called white lines mechanical, non ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botts' Dots
Botts' dots (turtles in Washington and Oregon or buttons in Texas and other southern states) are round non-reflective plastic and ceramic raised pavement markers. In many parts of the US, Botts' dots are used, along with reflective raised pavement markers, to mark lanes on highways and arterial roads. They provide tactile and auditory feedback to drivers when moving across designated travel lanes, and are analogous to rumble strips. Botts' dots are named after Elbert Dysart Botts, a California Department of Transportation (Caltrans) engineer credited with overseeing the research that led to the development of the markers. Botts' dots are most commonly white but may be yellow when used to substitute for the yellow lines that divide opposing directions of traffic in North America. Many California Botts Dots are made of ceramic, other dots may be made of plastics such as polyester. On some roads, lanes are marked only with a mix of Botts' dots and conventional reflectiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gated Community
A gated community (or walled community) is a form of residential community or housing estate containing strictly controlled entrances for pedestrians, bicycles, and automobiles, and often characterized by a closed perimeter of walls and fences. Historically, cities have built defensive city walls and controlled gates to protect their inhabitants, and such fortifications have also separated quarters of some cities. Today, gated communities usually consist of small residential streets and include various shared amenities. For smaller communities, these amenities may include only a park or other common area. For larger communities, it may be possible for residents to stay within the community for most daily activities. Gated communities are a type of common interest development, but are distinct from intentional communities. For socio-historical reasons, in the developed world they exist primarily in the United States. Given that gated communities are spatially a type of enc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire Hydrant
A fire hydrant, fireplug, firecock (archaic), hydrant riser or Johnny Pump is a connection point by which firefighters can tap into a water supply. It is a component of active fire protection. Underground fire hydrants have been used in Europe and Asia since at least the 18th century. Above-ground pillar-type hydrants are a 19th-century invention. Operation The user (most likely a fire department) attaches a hose to the fire hydrant, then opens a valve on the hydrant to provide a powerful flow of water, on the order of ; this pressure varies according to region and depends on various factors (including the size and location of the attached water main). This user can attach this hose to a fire engine, which can use a powerful pump to boost the water pressure and possibly split it into multiple streams. One may connect the hose with a threaded connection, instantaneous " quick connector" or a Storz connector. If a fire hydrant is opened or closed too quickly, a water hammer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Musical Road
A musical road is a road, or section of a road, which when driven over causes a Somatosensory system, tactile vibration and Hearing, audible rumbling that can be felt through the wheels and body of the vehicle. This rumbling is heard within the car as well as the surrounding area, in the form of a Melody, musical tune. Musical roads are known to exist in Hungary, Japan, South Korea, the United States, China, Iran, Taiwan, Indonesia, the United Arab Emirates, Argentina, Belarus, Russia and Turkey. In the past, they could be found in France, Denmark, and the Netherlands as well. Each note is produced by varying the spacing of strips in, or on, the road. For example, an E (musical note), E note requires a Scientific pitch notation#Table of note frequencies, frequency of around 330 vibrations a second. Therefore, strips apart will produce an E note in a vehicle travelling at . History Long before musical roads were being constructed, an earlier concept known as a rumble strip, were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lane
In road transport, a lane is part of a roadway that is designated to be used by a single line of vehicles to control and guide drivers and reduce traffic conflicts. Most public roads (highways) have at least two lanes, one for traffic in each direction, separated by lane markings. On multilane roadways and busier two-lane roads, lanes are designated with road surface markings. Major highways often have two multi-lane roadways separated by a median. Some roads and bridges that carry very low volumes of traffic are less than wide, and are only a single lane wide. Vehicles travelling in opposite directions must slow or stop to pass each other. In rural areas, these are often called country lanes. In urban areas, alleys are often only one lane wide. Urban and suburban one lane roads are often designated for one-way traffic. History For much of human history, roads did not need lane markings because most people walked or rode horses at relatively slow speeds. However, when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convex Set
In geometry, a set of points is convex if it contains every line segment between two points in the set. For example, a solid cube (geometry), cube is a convex set, but anything that is hollow or has an indent, for example, a crescent shape, is not convex. The boundary (topology), boundary of a convex set in the plane is always a convex curve. The intersection of all the convex sets that contain a given subset of Euclidean space is called the convex hull of . It is the smallest convex set containing . A convex function is a real-valued function defined on an interval (mathematics), interval with the property that its epigraph (mathematics), epigraph (the set of points on or above the graph of a function, graph of the function) is a convex set. Convex minimization is a subfield of mathematical optimization, optimization that studies the problem of minimizing convex functions over convex sets. The branch of mathematics devoted to the study of properties of convex sets and convex f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gear
A gear or gearwheel is a rotating machine part typically used to transmit rotational motion and/or torque by means of a series of teeth that engage with compatible teeth of another gear or other part. The teeth can be integral saliences or cavities machined on the part, or separate pegs inserted into it. In the latter case, the gear is usually called a cogwheel. A cog may be one of those pegsDefinition of "cog" in the ''Oxford Learner's Dictionary'' online. Accessed on 2024-07-29.Definition of "cog" in the ''Merriam-Webster Dictionary'' online. Accessed on 2024-07-29. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rumble Strip
Rumble strips (also known as sleeper lines or alert strips) are a traffic calming feature to alert inattentive drivers of potential danger, by causing a tactile vibration and audible rumbling transmitted through a vehicle's wheels into its interior. A rumble strip is applied along the direction of travel following an edgeline or centerline, to alert drivers when they drift from their lane. Rumble strips may also be installed in a series ''across'' the direction of travel, to warn drivers of a stop or slowdown ahead, or of an approaching danger spot. In favorable circumstances, rumble strips are effective (and cost-effective) at reducing accidents due to inattention. The effectiveness of shoulder rumble strips is largely dependent on a wide and stable road shoulder for a recovery, but there are several other less obvious factors that engineers consider during design. Other names Rumble strips are also known as audible lines, sleepy bumps, wake up calls, ruffles strips (n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snowplow
A snowplow (also snow plow, snowplough or snow plough) is a device intended for mounting on a vehicle, used for removing snow and ice from outdoor surfaces, typically those serving transportation purposes. Although this term is often used to refer to vehicles mounting such devices, more accurately they are known as winter service vehicles, especially in areas that regularly receive large amounts of snow every year, or in specific environments such as airfields. In other cases, pickup trucks and front end loaders are outfitted with attachments to fulfill this purpose. Some regions that do not frequently see snow may use graders to remove compacted snow and ice off the streets. Snowplows can also be mounted on rail cars or locomotives to clear railway tracks. Usage A snowplow works by using a blade to push snow to the side to clear it from a surface. Modern plows may include technology to make it easier to perform the work and stay on the road. These include Global Positioning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
School Zone
A school zone refers to an area on a street near a school or near a crosswalk leading to a school that has a likely presence of younger pedestrians. School zones generally have a reduced speed limit during certain hours. Fines Fines for speeding in school zones may be enhanced. For example, many authorities double speeding fines in school zones. In New South Wales, Australia there are increases in fines that apply in school zones, during school zone times. The most common offences that occur in a school zone also attract demerit points. This includes most parking offences, such as parking on a footpath or nature strip, double parking, disobeying a no stopping or no parking sign and stopping in a bus zone. In the United Kingdom the fine for stopping next to a school is £30. When active School zone speed limits are often, but not always, only applicable during posted weekday hours near the beginning and end of the school day, when children are likely to cross roads. In som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toll House
A tollhouse or toll house is a building with accommodation for a toll collector, beside a tollgate on a toll road, canal, or toll bridge. History Many tollhouses were built by turnpike trusts in England, Wales and Scotland during the 18th and early 19th centuries. Those built in the early 19th century often had a distinctive bay front to give the pikeman a clear view of the road and to provide a display area for the tollboard. In 1840, according to the Turnpike Returns in Parliamentary Papers, there were over 5,000 tollhouses operating in England. These were sold off in the 1880s when the turnpikes were closed. Many were demolished but several hundred have survived for residential or other use, with distinctive features of the old tollhouses still visible. Canal toll houses were built in very similar style to those on turnpikes. They are sited at major Lock (water navigation), canal locks or at junctions. The great age of canal-building in Britain was in the 18th century, so t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
