Health

Easy neck stretches for tension relief

It can happen when you're stuck in traffic, or hunched over for hours at your desk, or even sitting in the stands watching your child's lacrosse game—that painful twinge in the back of your neck.

Psychology & Psychiatry

How to cope with fear of public places after mass shootings

With the rise of mass shootings happening at night clubs, music festivals, schools and even grocery stores, it seems nowhere is safe anymore. In the wake of these tragic events, many people have developed a heightened awareness ...

Pediatrics

Building a better backpack

A well-organized backpack helps ensure that your child has everything needed for school. Problems start when it becomes overloaded. Lugging around a heavy pack can lead to bad posture, back pain and worse.

Health

Don't drink and drive on The Fourth

(HealthDay)—The Fourth of July holiday is one of the most deadly times on America's roads, so Mothers Against Drunk Driving (MADD) is urging everyone to avoid drinking and driving.

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Traffic

Traffic on roads may consist of pedestrians, ridden or herded animals, vehicles, streetcars and other conveyances, either singly or together, while using the public way for purposes of travel. Traffic laws are the laws which govern traffic and regulate vehicles, while rules of the road are both the laws and the 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.

Traffic is formally organized in many jurisdictions, with marked lanes, junctions, intersections, interchanges, traffic signals, 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 drivers' common sense and willingness to cooperate.

Organization typically produces a better combination of travel safety and efficiency. Events which disrupt the flow and may cause traffic to degenerate into a disorganized mess include: road construction, collisions and debris in the roadway. On particularly busy freeways, a minor disruption may persist in a phenomenon known as traffic waves. A complete breakdown of organization may result in traffic jams and gridlock. Simulations of organized traffic frequently involve queuing theory, stochastic processes and equations of mathematical physics applied to traffic flow.

This text uses material from Wikipedia, licensed under CC BY-SA