당신은 주제를 찾고 있습니까 “retractable speed bumps – Speed bumps have sensors“? 다음 카테고리의 웹사이트 https://ppa.charoenmotorcycles.com 에서 귀하의 모든 질문에 답변해 드립니다: ppa.charoenmotorcycles.com/blog. 바로 아래에서 답을 찾을 수 있습니다. 작성자 JSN Amazing Stuffs 이(가) 작성한 기사에는 조회수 15회 및 좋아요 1개 개의 좋아요가 있습니다.
retractable speed bumps 주제에 대한 동영상 보기
여기에서 이 주제에 대한 비디오를 시청하십시오. 주의 깊게 살펴보고 읽고 있는 내용에 대한 피드백을 제공하세요!
d여기에서 Speed bumps have sensors – retractable speed bumps 주제에 대한 세부정보를 참조하세요
These retractable speed bumps have sensors that detect if a car is traveling at a safe speed.
retractable speed bumps 주제에 대한 자세한 내용은 여기를 참조하세요.
ELTEC’s New Retractable Speed Bump
Traffic Speed Modulation LLC designed the retractable speed humps. The mechanical engineering works through an industrial railroad airbag in the …
Source: elteccorp.com
Date Published: 4/27/2021
View: 8376
Products | School | Retractable Speed Hump
ELTEC’s retractable speed hump helps ensure motorists will slow down when the school zone flashing beacons are initiated and ON. Multiple models of ELTEC’s …
Source: www.tsandl.us
Date Published: 11/1/2022
View: 6106
주제와 관련된 이미지 retractable speed bumps
주제와 관련된 더 많은 사진을 참조하십시오 Speed bumps have sensors. 댓글에서 더 많은 관련 이미지를 보거나 필요한 경우 더 많은 관련 기사를 볼 수 있습니다.
주제에 대한 기사 평가 retractable speed bumps
- Author: JSN Amazing Stuffs
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- Date Published: 2020. 1. 15.
- Video Url link: https://www.youtube.com/watch?v=XykSyycONgY
What is the difference between speed bumps and humps?
Comparison to speed bumps
While similar to speed bumps, humps are less aggressive than speed bumps at low speeds. Humps are often used on streets, while bumps are used more in parking lots. While speed bumps generally slow cars to 8–16 km/h (5–10 mph), humps slow cars to 24–32 km/h (15–20 mph).
What is a Mexican speed bump?
Upon crossing the border into Mexico you will encounter a tope (pronounced toe-pay). This is the Spanish word for bump and it’s used for speed bumps as well. These concrete and rock humps in the road vary in steepness, width, and severity but they’re all hellish. We drove over thousands of them.
What is an inverted speed bump?
A radar measures the speed of the oncoming vehicles; when a speeding vehicles is sensed, a hatch is lowered a few centimetres into the road surface, creating an inverted speed bump to slow the car down. Curtin University has installed and will be testing two systems, in an effort to dissuade lead foots around campus.
Can sports cars go over speed bumps?
Modern supercars, such as Lamborghinis, can easily go over speedbumps using their front-axle lift system. This feature can lift the front suspension, and thus the front bumper, at the push of a button.
What happens if you hit a speed bump too fast?
Sometimes slowing down isn’t an option though and hitting a speed bump at speed, or the wrong angle can cause significant damage to a car. Hitting a speed bump can cause the suspension in your car to compress as it attempts to absorb the bump excessively.
Do speed bumps lower property values?
The homes examined sold, for the most part, at prices between $175,000 and $300,000 (the average was around $250,000), and each speed bump between the main drag and the house appeared to reduce home values by $5,000 or more.
Which country has the most speed bumps?
Speed bump capital
But we were a bit surprised that so many people around the world were speed bump connoisseurs. But since that is the reality of things you’ll be happy to know that Iceland also has the town with the most speed bumps per square kilometre in the world–Kópavogur.
Why is there so many speed bumps in Mexico?
They’re a means of enforcing speed control and civility on the road, and they can’t be avoided. They can’t be bribed to look the other way. But topes also reflect the same failures that they aim to fix. There appear to be few rules governing what they look like or where they go.
Why are they called sleeping policeman?
The sleeping policeman name was originated in Britain. However it has many different names in other countries. In New Zealand English they are called a Juddar Bar and in Croatia, Slovenia and Russia they use the term Lying-Down Policeman to describe a speed bump.
What is the difference between a speed bump and a speed table?
Speed tables are longer than speed humps and flat-topped, with a height of 3–3.5 inches and a length of 22 feet. Vehicle operating speeds for streets with speed tables range from 25–45 mph, depending on the spacing. Speed tables may be used on collector streets and/or transit and emergency response routes.
What do white lines on speed bumps mean?
In some cases, the single white line is there to indicate that there’s no pavement – if this is the case then it’s illegal to park there.
How do Lowered cars get over speed bumps?
The best and most comfortable way to go over a speed bump is to accelerate moderately or avoid braking when going over the bump. When you brake, the front end of your vehicle is lowered while accelerating lifts it. Slow down, release the brake before the bump, once you reach the top of the bump, accelerate.
Why do luxury cars have low ground clearance?
Low ground clearance is common in racing cars because it improves the handling of the vehicle. A car with low ground clearance sticks close to the ground more strongly, and is therefore less likely to topple or roll over when abrupt and sharp turns are made.
What is the difference between a bump and hump?
…
Difference between Speed Humps and Speed Bumps.
| Speed Hump | Speed Bump |
|---|---|
| Speed Humps are lower and are placed at a longer driving distance. | Speed Bumps are lower and are placed at a longer driving distance. |
What is another word for speed bump?
| bump | hump |
|---|---|
| ramp | ridge |
| speed hump | undulation |
| traffic calming measure | Botts’ dots |
| judder bar | silent policeman |
What are speed bumps called in Florida?
“So they should reinvest it back here, so we’re happy.” Sarasota County says these so called speed cushions/bumps are designed to slow cars to between 15 to 20 miles per hour. County officials say this is an innovative solution that can help slow speeders without slowing emergency vehicles.
What’s the purpose of road humps?
A General Guide – Introduction. Road humps were formally introduced in this country during the early 1980’s. Their main purpose is to reduce vehicle speed and therefore reduce the number and severity of road traffic accidents. Through traffic may also be reduced.
ELTEC’s New Retractable Speed Bump
Gone are the days of worrying for the safety of students at Overton Ray Elementary School, located on a busy road in Burkburnett, Texas. In an effort to increase the safety for students and pedestrians, ELTEC worked in conjunction with Traffic Speed Modulation LLC and the city of Burkburnett to make this new technology of a retractable speed hump reality. Burkburnett is currently the only city in the country to use this technology, but this is only just the beginning.
With a need to make the high-traffic road safer for the school children, the idea of a retractable speed hump was born. For the majority of the day, the speed humps are flat against the road. However, during the school hours, the speed bumps raise 2” off the ground. The retractable speed humps are located strategically, with one being near a footbridge used by students walking to school and the other near the field where students play while at school.
In order to make these speed humps as efficient as possible, ELTEC saw a need to design a way for the timing of the lifting and retracting to happen automatically. Our time clock has been programmed for this new technology to work at the same time each day, forcing cars traveling near the school during school hours to slow down and be more aware when approaching. The humps are located near flashing 20 MPH speed signs to bring awareness to drivers as the city adjusts to the new additions.
Traffic Speed Modulation LLC designed the retractable speed humps. The mechanical engineering works through an industrial railroad airbag in the center that is located below the ground. Once it inflates, it causes the incline in the outer pieces of the hump that keep it mounted on a slope at 2” raised. Our team at ELTEC met Traffic Speed Modulation LLC and the city of Burkburnett in October of 2017 in Houston at a Texas Municipal League conference. Recognizing the need for increased safety and new technology, we saw an opportunity to test our product in a place where it was needed.
In exchange for the data from the project, we provided the city of Burkburnett with the retractable speed hump for free. The city of Burkburnett only needed to supply the resources for the installation and the engineering, which totaled $44,000. This exciting feat is just one-way ELTEC is working to improve the safety of pedestrians, especially children, as we work to utilize technology for the safety of communities everywhere.
Our future plans for the retractable speed humps are to utilize the data to create an effective product that can be used to ensure safe driving on roads where an added safety venture is necessary. Our plans include selling the systems to cities everywhere for around $20,000. We are excited about the use of this new technology to increase awareness of drivers and save lives. The future of pedestrian safety isn’t something we take lightly, and we are passionate about consistently moving forward in this effort.
Speed bump
Traffic calming device
Speed bump and warning signs
A road sign “Humps for 1 mile” in Hertfordshire , England
Speed bumps (also called traffic thresholds, speed breakers or sleeping policemen) are the common name for a class of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions. Variations include the speed hump, speed cushion, and speed table.
The use of vertical deflection devices is widespread around the world, and they are most commonly found to enforce a low speed limit, under 40 km/h (25 mph) or lower.
Although speed bumps are effective in keeping vehicle speeds down, their use is sometimes controversial—as they can increase traffic noise, may damage vehicles if traversed at too great a speed, and slow emergency vehicles. Poorly-designed speed bumps that stand too tall or with too-sharp an angle can be disruptive for drivers, and may be difficult to navigate for vehicles with low ground clearance, even at very low speeds. Many sports cars have this problem with such speed bumps. Speed bumps can also pose serious hazards to motorcyclists and bicyclists if they are not clearly visible, though in some cases a small cut across the bump allows those vehicles to traverse without impediment. Speed bumps cost $50–200 and may need replacement over time due to wear.[1]
Composition [ edit ]
Each of these devices can be made from a variety of materials, including asphalt, concrete, recycled plastic, metal, or vulcanized rubber. Several trade-offs must be made when selecting the material for a new speed cushion. Traditionally most vertical deflection devices have been constructed of asphalt or concrete. Due to the rigidity and durability of these materials, they have more permanence and are more effective at slowing traffic. However, they can be difficult to shape and form into consistent forms and precise dimensions.
Rubber products are pre-shaped to standard sizes to meet industry standards. Preformed rubber products are typically bolted down, making them easier to install or remove. Temporary bolt-down installations can be ideal for planners in testing the use and positioning of speed bumps before implementing them in a larger project. Bolt-down products can also be removed or relocated during winter snow periods—where speed bumps are easily concealed and may be damaged by snowplows.
History [ edit ]
On June 7, 1906, The New York Times reported on an early implementation of what might be considered speed bumps in Chatham, New Jersey, which planned to raise its crosswalks five inches above the road level: “This scheme of stopping automobile speeding has been discussed by different municipalities, but Chatham is the first place to put it in practice”.[2] The average automobile’s top speed at the time was around 30 mph (48 km/h), but braking was poor by modern standards.[citation needed]
Arthur Holly Compton was a physicist and winner of the Nobel Prize in physics in 1927 for his discoveries resulting in major changes in electromagnetic theory. He is commonly known for his work on the Compton Effect with X-rays. He also invented what he called “traffic control bumps,” the basic design for the speed hump, in 1953. Compton began designs on the speed bump after noticing the speed at which motorists passed Brookings Hall at Washington University in St. Louis, Missouri, where he was chancellor.[3]
The British Transport and Road Research Laboratory published a comprehensive report in 1973 examining vehicle behavior for a large variety of different bump geometries.[4] At the time speed humps were not permitted on public roads but had been installed on private roads.
According to a publication by the Institute of Transportation Engineers, the first speed bump in Europe was built in 1970 in the city of Delft in the Netherlands.[5]
Speed bumps [ edit ]
Speed bump made of asphalt
Speed bump made of rubber
A speed bump is also known as a sleeping policeman in British English, Maltese English and Caribbean English, a judder bar in New Zealand English, and a lying-down policeman in Colombia, Dominican Republic, Croatia, Serbia, Estonia, Lithuania, Slovenia, Bulgaria and Russia. A speed bump is a bump in a roadway with heights typically ranging between 76 and 102 millimetres (3 and 4 in). The traverse distance of a speed bump is typically less than or near to 0.30 m (1 ft); contrasting with the wider speed humps, which typically have a traverse distance of 3.0 to 4.3 m (10 to 14 ft).[6][7]
Speed bumps vary in length, but it is typical to leave space between the bump and either edge of an enclosed road (i.e. with curbs and gutters) to allow for drainage. Spaces on either side may also allow more expedient passage for emergency vehicles, though effectiveness will depend on the type of vehicle and specific road design.
Disadvantages [ edit ]
Local authorities have cited disadvantages to speed bumps:
The city of Modesto in California, produced a fact sheet which contains the following disadvantages: [8] Slow response time of emergency vehicles; May divert traffic to parallel residential streets; and Possible increase in noise and pollution for residents living immediately adjacent to the speed bumps.
The English town of Eastleigh states the following as disadvantages: [9] Can cause damage to some vehicles; Can increase traffic noise, especially when large goods vehicles pass by; Required signs, street lighting and white lines may be visually intrusive; Can cause discomfort for drivers and passengers; Can cause problems for emergency services and buses.
Other sources argue that speed bumps:
Distract drivers from other hazards such as children
Increase pollution as traffic travels in a lower gear using significantly more fuel per mile;
Are a compromise for more active enforcement;
Increase noise by creating tire-to-bump thumping and increasing the amount of engine-revving;
Cause spinal damage[10] and aggravate chronic backache.
In 2003, the chairman of the London Ambulance Service, Sigurd Reinton claimed that delays caused by speed bumps were responsible for up to 500 avoidable deaths from cardiac arrest each year. He later denied the statement.[11]
In Sweden, an evaluation of spinal stress in bus drivers against ISO 2631-5 required on health grounds that:[12]
bus drivers avoid certain streets until the humps were modified; and
the maximum acceptable speed be reduced to 10 kilometres per hour (6.2 mph; 2.8 m/s) on one street for drivers encountering 150 humps in a day.
Speed bumps can also have adverse environmental impact. A study found that in one north London street with a speed limit of 20 miles per hour (32 km/h; 8.9 m/s) and fitted with road humps, a petrol driven car produced 64 per cent more nitrogen dioxide (NO 2 ) than in a similar 20 miles per hour (32 km/h; 8.9 m/s) street fitted with road cushions. It also produced 47 per cent more particulate matter (PM) and nearly 60 per cent more carbon monoxide (CO) emissions.[13] Another study estimated that, for a private automobile, the increase in fuel consumption due a pass over a speed bump is responsible for fuel waste of 10ml.[14] This multiplied with the number of vehicles going over a particular speed bump every day suggests significant annual fuel wastage for a single speed bump.
Dynamic speed bumps [ edit ]
Dynamic speed bumps differ from conventional speed bumps in that they only activate if a vehicle is traveling above a certain speed. Vehicles traveling below this speed will not experience the discomfort of a conventional speed bump. Dynamic speed bumps may allow the passage of emergency vehicles at higher speeds.
The Actibump system, successfully used in Sweden, is based on powered equipment integrated into the road surface, which operates a platform that is lowered a few centimeters when a speeding vehicle approaches. Any vehicle approaching at or under the speed limit will pass on a level road. The system measures the speed of an oncoming vehicle by using radar.[15]
In another design, a rubber housing is fitted with a pressure relief valve that determines the speed of a vehicle. If the vehicle is traveling below the set speed, the valve opens allowing the bump to deflate as the vehicle drives over it, but it remains closed if the vehicle is traveling too fast. The valve can also be set to allow heavy vehicles, such as fire trucks, ambulances, and buses to cross at higher speeds.[16][17]
Speed humps [ edit ]
Speed hump made of asphalt
A speed hump (also called a road hump, or undulation,[18] and speed ramp) is a rounded traffic calming device used to reduce vehicle speed and thus sound volume on residential streets. Humps are placed across the road to slow traffic and are often installed in a series of several humps to prevent cars from speeding before and after the hump. Common speed hump shapes are parabolic, circular, and sinusoidal.[18] In Norway, speed humps are often placed at pedestrian crossings.
Generally, speed humps have a traverse distance of about 3.7 to 4.3 m (12 to 14 ft) and span the width of the road. The height of each hump ranges from 76 to 102 mm (3 to 4 in).[18] The traverse distance and height of each hump determines the speed at which traffic will travel over the devices. Shorter traverse lengths and greater heights slow cars most drastically. When placed in a series 110–170 m (350–550 ft) apart, humps will reduce 85th percentile speeds by 13–16 km/h (8–10 mph).[19]
Warning signs should be used to notify approaching motorists of upcoming humps. Humps generally have pavement markings to enhance visibility and a taper edge near the curb to allow a gap for drainage.[18]
Speed humps are used in locations where low speeds are desired and suitable for the surrounding traffic environment.[20] Speed humps are typically placed on residential roads and are not used on major roads, bus routes, or primary emergency response routes. Placement is generally mid-block between intersections.
Results [ edit ]
Speed humps typically limit vehicle speeds to about 24–32 km/h (15–20 mph) at the hump and 40–48 km/h (25–30 mph) at the midpoint between humps, depending on spacing. Studies show an average 18% reduction in traffic volume and an average 13% reduction in collisions.[18]
Comparison to speed bumps [ edit ]
While similar to speed bumps, humps are less aggressive than speed bumps at low speeds. Humps are often used on streets, while bumps are used more in parking lots.[21] While speed bumps generally slow cars to 8–16 km/h (5–10 mph), humps slow cars to 24–32 km/h (15–20 mph). The narrow traverse distance of speed bumps often allows vehicles to pass over them at high speed with only mild disturbance to the wheels and suspension, and hardly affecting the vehicle cab and its occupants. The relatively long slopes of speed humps are less disruptive at low–moderate speeds, but they create a greater, more sustained vertical deflection; at higher speeds, a more sustained deflection is less-absorbed by vehicle suspensions and has a greater effect on the vehicle as a whole.[22]
Problems [ edit ]
One problematic aspect of speed humps is their effect on emergency vehicles. Response time is slowed by 3–5 seconds per hump for fire trucks and fire engines and up to 10 seconds for ambulances with patients on board.[18] Speed humps are thus usually not placed on primary response routes. Speed cushions may be placed on these routes instead.
Occasionally, there is an increase in traffic noise from braking and acceleration of vehicles on streets with speed humps, particularly from buses and trucks. Other effects include increased fuel consumption and emissions[citation needed] as well as increased wear and tear on brakes, engine and suspension components.
Damage caused by snow plows during the winter months is an additional concern.
Heavy sedans, trucks, and SUVs are less affected by speed humps, and may not have to slow down as dramatically.
Thin cuts are sometimes placed in the middle of a hump in order to allow bicycle traffic to pass through. However, forcing cyclists to take a particular line on the road compromises their ability to position themselves safely according to the other traffic on the road at the time.
Speed cushions [ edit ]
Speed cushions in Canada. Gaps allow wide-track emergency vehicles to pass at higher speeds than they can through other traffic calming devices like speed humps.
Speed cushions are a type of speed hump installation designed to alleviate the negative impacts that vertical deflections have on emergency vehicle response times. Speed cushions installations are typically made up of several small speed humps installed across the width of the road with spaces between them. They force normal cars to slow down as they ride with one or both wheels over the humps. Meanwhile, they allow fire engines (and other large vehicles) with wider axles to straddle the cushions without slowing down.[23][24]
Wider, American-style ambulances might also be able to straddle speed cushions. However, in Europe and Australia, where vehicles like the Mercedes-Benz Sprinter are used most frequently as ambulances, there is no advantage. In these jurisdictions, narrower speed cushions are sometimes placed between lanes to allow ambulances to pass unobstructed while driving over the centre line during an emergency.
Advantages [ edit ]
Speed cushions have several distinct advantages over similar traffic calming devices. Many municipalities are challenged by opposition to speed humps and speed tables since they slow down emergency vehicles. Speed cushions address this problem by allowing larger vehicles to straddle the cushion without slowing down. This is also an advantage for buses, as lower floor vehicles can sometimes ground out on traditional humps.
Speed cushions are often less costly than speed humps or tables, and most cities report them to be just as effective. In some jurisdictions, narrower speed cushions are placed at more frequent intervals to allow ambulances to pass while driving over the centre line. Large trucks are also not slowed down.
Use in North America and Europe [ edit ]
Development of speed cushions has focused primarily on the European context. European vehicles typically have a narrower track width than American vehicles, meaning their left and right wheels are closer together. Emergency vehicles still feature a wide track width, and the difference between them makes speed cushions more applicable.
In North America, however, consumer vehicles have a track width of 1,300–1,500 millimetres (50–59 in). Many emergency vehicles are also equipped with dual tires on their rear axles. The additional tires limit track width to as narrow as 1,200 millimetres (48 in), meaning speed cushions may not be suitable for their intended use.
Speed tables [ edit ]
A less intrusive table in Auckland, New Zealand, which sacrifices some height and visual effect for integration into a high-quality road finish area. Note that part of the traffic calming effect is reached here via rough cobble stones.
A speed table (or flat top hump or raised pedestrian crossing) is designed as a long speed hump with a flat section in the middle. Speed tables are generally long enough for the entire wheelbase of a passenger car to rest on top.[25] The long, flat design allows cars to pass without slowing as significantly as with speed humps or cushions.[26] Because they slow cars less than similar devices, speed tables are often used on roads with typical residential speed limits.
Speed tables can also be signed as pedestrian crossings, namely zebra crossings. A raised zebra crossing is referred to as a wombat crossing in Australia.[27] Other road features may be included, such as junctions, or even mini-roundabouts. Speed tables are used with zebra crossings repeatedly in Leighton Buzzard.
Results [ edit ]
Typical speeds resulting from 7-metre (22 ft) speed tables are 32–48 kilometres per hour (20–30 mph). One sample of 8 sites found a 45% decrease in accidents per year with the use of speed tables.[26] Wombat crossings may reduce casualties by 63%.[27]
Advantages [ edit ]
Speed tables are effective in calming traffic on streets where the speed limit needs to be maintained rather than slowing cars more significantly. Traffic speed, volumes, and accidents have been shown to decrease with the use of tables. Although not as responsive to emergency vehicles as speed cushions, speed tables cause less of a delay than humps and are typically preferred by fire departments over speed humps.[25]
In the United Kingdom [ edit ]
In the UK, vertical deflection in highways for the purpose of traffic calming typically takes one of the following forms:
Road humps are the most common variety, and are usually round-topped.
Speed tables, a type of hump with a central plateau which is both long and broad, and which may include a pedestrian crossing, junction or roundabout, are preferred by some emergency services and bus operators.
Speed cushions, a raised portion of road with a flat top only extending over part of the carriageway’s width, are used singly, in a pinch point, or in pairs or triples.
Rumble strips, uneven road surfaces, are now only used in rural areas and retail parks because of the noise.
The Department for Transport defines the regulations for the design and use of road humps.[28]
Opposition [ edit ]
Speed bumps in some areas have been removed after protests by local residents. Such protests cite the lack of any consultation as one factor.[29] For example, complaints from Derby residents prompted the removal of 146 speed bumps from streets at a cost of £460,000. Similar incidents have been reported elsewhere in the UK.[30] UK news sources reported a cyclist being killed in a crash while attempting to avoid a speed bump.[31]
See also [ edit ]
Mexican Speed Bumps We Have Known and Loathed
Speed bumps are a cruel reality for anyone on a Mexican road trip. Here are a few we’ve known and loathed in Mexico and beyond.
Mexican speed bump primer
Upon crossing the border into Mexico you will encounter a tope (pronounced toe-pay). This is the Spanish word for bump and it’s used for speed bumps as well. These concrete and rock humps in the road vary in steepness, width, and severity but they’re all hellish. We drove over thousands of them.
Topes are efficient and brutal–especially the ones that are unsigned and sneak up on you before you can slow down. There’s a reason there’s almost always a tire repair shack at or near a tope. They’re also dreadful for your fuel economy and your shocks–which is part of the reason we upgraded to Bilstein shocks.
By the time we left Mexico we’d come up with a few new terms relating to topes (no, they’re not swear words):
nope (pronounced no-pay): this is what you find when you slow down and reach what you thought was a tope only to discover that it’s not.
rope (pronounced row-pay): this is a tope made by laying a massive rope across the road. These can be even more brutal than the stone and concrete varieties.
slope (pronounced slow-pay): this is a tope made with gentle angles and slopes so that it can be glided over at a higher speed.
gatope (pronounced ga-toe-pay): this is a tope of any sort with a cat (gato) sitting next to it.
International speed bump primer
Speed bumps exist throughout Latin America. In Belize, they’re called sleeping policemen. In Brazil they’re called lamadas. In Argentina they’re sometimes called lomo de burro. In Peru they’re called gibas. Our favorite term may be rompe muele, which roughly translates to broken suspension. Nice.
Whatever you call them, they’re a pain in the neck.
Here’s more about travel in Mexico
Burk has a new retractable speed hump
WICHITA FALLS, TX (RNN Texoma) – A high traffic road in Burkburnett is getting an upgrade, a new high-tech speed bump.
Burkburnett city officials and Burkburnett ISD employees worked together to get two retractable speed humps in front of the new Overton Ray Elementary School, near the new foot bridge and across the baseball field the children play in.
“We just want to make there’s an extra layer of security for those young pedestrians,” City Manager Lawrence Cutrone said.
The way the eight foot wide speed humps use solar power, the metal plates inflate using industrial rail road air bags. It is programmed to work during school hours using an ELTEC time clock, a company that specializes in the Traffic industry. The retractable speed hums were created by a different company, Traffic Speed Modulation LLC.
“The airbag inflates the center section which causes the incline in the outer two sections contained within the hump within the fixture mounted inside the pavement,” Tim McElheney, owner of Traffic Speed Modulation LLC said.
The parties all met October of last year at a Texas Municipal League conference in Houston.
“ELTEC made the deal if we could beta the test their product in the city then we can get the product for free in exchange for data,” Cutrone said.
Cutrone said the city of Burkburnett only had to pay for engineering and the installation, a total of $44,000. Burkburnett is the only city in the country to use this technology.
“That is pretty impressive,” Cutrone said. “We’re coming up with new ideas to progress the city overall whether it’s safety, or infrastructure, products, programs, services. We’re going to everything we can here to get Burkburnett moving in a positive direction and get more residents to move here.”
It is also the only city that will be used as a beta site.
“We won’t be looking for any more test sites,” April Spears, CEO and president of ELTEC said. “We’ll start selling the systems and that would be around $20,000 or so depending on how many speed humps they need and how many systems are needed to power the speed humps.”
ELTEC plans to collect the data recorded on November on Saturday.
Copyright 2018 RNN Texoma. All rights reserved.
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Durable Wholesale retractable speed bump for Road Safety – Alibaba.com
About products and suppliers:
Get wholesaleretractable speed bump at Alibaba.com that’s designed for your needs. Alibaba.com provides you and your business with the products you are interested in. The rubber material that we use is strong and pressure-resistant. The textures and patterns on the surface will have a longer-lasting time. The color paint will not fade away easily, so it also keeps the environment presentable no matter where retractable speed bump is placed. Customization service is offered if necessary.
The colors yellow and black are recommended because they are eye-catching and can be seen from a distance. This supports the goal of signaling drivers to slow down and avoid traffic accidents as much as possible.
The patterns on retractable speed bump help prevent cars from slipping. Vehicles passing by after the rains will not be a concern as the level of friction is increased. The curved shape also helps slow down the vehicles. We offer a wide range of specifications for your needs. The product is strong and withstands a lot of pressure, but it is also lightweight, so it can be transferred to other places easily. Shop wholesale retractable speed bump at Alibaba.com and tell us which patterns and sizes you would like to use, and get them for a good price.
Speed Bumps vs. Speed Humps
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Choosing an ideal traffic calming strategy
Wherever people and cars are in close proximity, traffic safety is of heightened concern. Near playgrounds and schools, in parking lots and multiuse areas, aggressive driving is a safety risk for pedestrians. Speed reduction is one way to protect people in these areas. Slower traffic speeds reduce both the likelihood of an accident and the chance of a fatality should one occur.
Both speed bumps and humps are useful to encourage safe driving in pedestrian zones.
Though speed zones are often set up to encourage safe driving, posted limits can be missed or ignored, so traffic calming in these areas often incorporates physical design of the roadway or environment.
Speed bumps and speed humps are vertical obstacles used in traffic management—literal bumps in the road that jolt the occupants of a vehicle moving too quickly over them. They are the most commonly used structural traffic calming elements. They can be made from asphalt, concrete, plastic, rubber, or metal. Although these measures are related, and have many of the same benefits, they are not interchangeable solutions: they’re appropriate in different applications.
Speed humps
Speed humps, sometimes called road humps or undulations, are used for 10–15 mph speed zones. They’re often seen on local streets or connector roads where traffic needs to flow smoothly but excessive speed will endanger pedestrians. Playground and school zones often use these in traffic management.
A speed hump creates a gentle rocking sensation in a car passing over it at the posted speed limit. If a car is driving at unsafe speed, the hump will jar the vehicle and its contents, causing discomfort to the occupants and disruption to cargo. These obstacles usually span the lane they are placed in. This way, vehicles are encouraged to pass over them with both wheels, reducing the likelihood of bottoming out.
Speed humps come in a variety of profiles and travel lengths. These factors influence the experience of discomfort created in the speeding vehicle. Travel length varies between 3–20 feet. Any travel length longer than the vehicle creates only one up-and-down motion, whereas a travel length shorter than the vehicle creates two rocking movements as each set of wheels passes over. Speed humps are most often placed in a series, maintaining speed reduction through a long corridor.
These vertical deflections are not a good choice for arterial roads, emergency routes, or on any street where it is easy for a car to evade the hump by driving on a shoulder. Because of this, they’re usually installed in one or two lane local urban settings where there are curbs and closed sewers. If speed humps are installed in areas where there is a shoulder, they are often twinned with bollards or other obstructive measures to prevent cars from leaving the roadway.
Speed bumps
Speed bumps are more aggressive traffic calming options than speed humps, and so are useful in places where pedestrians and cars share space closely, like parking lots and driveways. A speed bump generally slows traffic to 2–10 mph, giving both people and cars time to react safely to one another. Speed bumps are rarely used on public roads because they require vehicles to come to a near stop to pass over them, and can do damage to cars moving at regular speeds.
Speed bumps can be two to four inches high, but they have a much shorter travel distance than speed humps. These obstacles are under a vehicle’s tire for less than half of a full wheel rotation, with standard widths are between six inches and two feet. The height to travel-distance ratio creates an abrupt bounce in a vehicle, which can shake both occupants and cargo. Since a speed bump is always much smaller than vehicles passing over it, each axle will cross separately, meaning a car moving at excessive speed will receive two substantial jolts.
Speed bumps, like their more sedate siblings, can be placed at intervals to maintain speed reduction. They are often spaced judiciously as they are more uncomfortable to go over at any speed and are used in smaller geographical areas.
Speed bumps can deliver a shock, which is perhaps why they have developed colorful names around the world. They’re known as speed breakers (India), judder bars (NZ), sleeping policemen (UK), and road turtles (Southern US). In French, they’re known as “dos-d’âne,” or literally, “humpback.”
Benefits and cautions
One of the great strengths of speed bumps and humps is that they remain a deterrent no matter how accustomed drivers become to their presence. Flashing signs or intermittent traffic enforcement change behaviors for a while, but drivers often revert to previous behavior. One can disregard a sign, but not the road beneath. A speed hump or a speed bump creates the same discomfort for a driver going too quickly whether it is their first or their hundredth time over it.
A bump in the road is not perfect for every traffic calming scenario. Obstacles work best when the driver knows they’re coming and starts slowing down before arriving at their edge. Speed bumps and humps are usually well marked with contrasting colors or reflective surfaces to ensure visibility, but they also need to be installed in places where a driver can see them coming. They are not effective when used in the middle of a long curve, or on streets where the grade is greater than 8%. A steep grade can also change the effective height of a speed hump or bump, and create more of an impact than is intended. Visibility can also be an issue in some winter climates where snowfall is deep and local streets go unplowed.
Speed humps and bumps are also not recommended for arterial or emergency roads, where they can be a hazard. If unexpected or taken at too high a speed, these obstacles can cause a driver to lose control or damage a vehicle.
However, when used in the proper setting, these are the most adaptable tools in the traffic management toolbox.
Materials and installation
Speed bumps and speed humps are usually made from rubber or asphalt. Plastic, metal, and concrete options are available as well.
When made from rubber or plastic, these obstacles are easy to install on pre-existing surfaces, allowing for a rapid and effective set up. Both options are lightweight and can be installed temporarily. Very restrictive installations, with many placed close together in series, can create a challenge to snow removal in winter climates: both rubber and plastic speed bumps can be uninstalled to facilitate these operations.
Rubber has greater compression than asphalt or concrete, which can be a benefit to a vehicle that hits it too quickly, at an angle, or is low to the ground, because it is less likely to do the vehicle damage. This greater compression means that rubber obstacles of the same height are slightly less effective at slowing traffic than similar asphalt installations, and rubber or plastic are not ideal for roads on which there is constant passage of heavy industrial traffic. However, in normal conditions, rubber is tough and long lasting, and is inexpensive to buy and install.
Asphalt or concrete speed humps are often installed by municipal road crews or private paving companies. They must have precision and expertise in the area, or the installation can go poorly. With a sufficiently expert crew, asphalt can allow custom construction of obstacle shape and travel length. Both materials have less compression so are slightly more effective than rubber or plastic at speed reduction. Over time, and in variable weather, however, asphalt and concrete will tend to wear and crack.
Simple and effective traffic management
Both speed bumps and humps are useful to encourage safe driving in pedestrian zones. Speed humps are useful in places where traffic needs to flow, and speed bumps in small areas where pedestrians and traffic share space more equally. Both are less planning intensive compared to other physical traffic calming methods like roundabouts or one-way streets, and modular, prebuilt versions can be installed simply and inexpensively on existing surfaces. Larger speed humps and their small but forceful cousins, speed bumps, are traffic safety superstars, when put on the right stage.
키워드에 대한 정보 retractable speed bumps
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