Traffic congestion
hideTraffic congestion is a condition on networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream, congestion is incurred. As demand approaches the capacity of a road (or of the intersections along the road), extreme traffic congestion sets in. When vehicles are fully stopped for periods of time, this is colloquially known as a traffic jam.
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News tagged with traffic jams
Beijing vehicles exceed four million: state media
Dec 19, 2009 |
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The number of registered vehicles in Beijing topped four million this week, state media reported, meaning a quarter of the 16 million permanent residents in China's capital have a car.
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Comcast settles data discrimination lawsuit
Dec 23, 2009 |
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(AP) -- Comcast will pay up to $16 million to settle a class-action lawsuit accusing the cable TV operator of delaying certain Internet traffic.
Scientists discover 2 genes that drive aggressive brain cancers
Dec 23, 2009 |
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A team of Columbia scientists have discovered two genes that, when simultaneously activated, are responsible for the most aggressive forms of human brain cancer.
Pollution linked to hospitalizations for pneumonia in older adults
Dec 23, 2009 |
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Older adults with long-term exposure to higher levels of pollution are at higher risk for hospitalization for pneumonia, according to researchers in Canada.
Controlling the TV with a wave of the hand
Electronics / Consumer & Gadgets
Dec 23, 2009 |
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Touchscreens are so yesterday. Remote controls? So last century. The future is controlling your devices with a simple wave of the hand.
Understanding relationship of proteins, fatty acids could help treat diseases
Dec 22, 2009 |
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(PhysOrg.com) -- It's widely understood that eating a diet high in saturated fats increases the risk for a long list of chronic and deadly diseases, including diabetes and coronary heart disease. Understanding ...
Efficient new wireless system can save 10 percent of bandwidth
Dec 22, 2009 |
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Driven by fast-growing use of smart phones and Internet videos, wireless communication among Americans is expanding so rapidly that a tsunami of megabytes could soon threaten to overwhelm the bandwidth available.
EPA, Army Corps urged to consider separating Great Lakes, river basin
Dec 21, 2009 |
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The once-radical idea of somehow plugging the Chicago Sanitary and Ship Canal to stop the flow of unwanted species from spilling between the Great Lakes and Mississippi River basin is quickly picking up political support.
Stern's threat to quit Sirius could be empty talk
Dec 21, 2009 |
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(AP) --Howard Stern is threatening to leave Sirius XM Radio Inc. now that the shock jock and the satellite radio provider are getting set to enter contract talks in 2010.
Smarter cars are gaining traction (w/ Video)
Dec 21, 2009 |
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(PhysOrg.com) -- Lives can depend on a vehicle's moment-by-moment traction. New European technology promises to make cars as good as experienced, alert drivers at sensing and adjusting to wet, snowy or icy ...
Putting the squeeze on data
Technology / Computer Sciences
Dec 21, 2009 |
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(PhysOrg.com) -- Data compression is one of the fundamental research areas in computer science, letting information systems do more with less. It’s the reason the iPod nano can hold thousands of songs instead ...
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