 Standard guardrail (A-profile) A crash barrier is a barrier on a road designed to prevent vehicles from leaving the roadway to improve road safety. Common sites for crash barriers are: Image File history File links Size of this preview: 800 × 600 pixelsFull resolution (1024 × 768 pixel, file size: 368 KB, MIME type: image/jpeg) A crash barrier, to prevent cars from going over the embankment. ...
Image File history File links Size of this preview: 800 × 600 pixelsFull resolution (1024 × 768 pixel, file size: 368 KB, MIME type: image/jpeg) A crash barrier, to prevent cars from going over the embankment. ...
The field of road safety is concerned with reducing the numbers or the consequences of vehicle crashes, by developing and implementing management systems ideally based in a multidisciplinary and holistic approach, with interrelated activities in a number of fields. ...
- median separators on multi-lane highways
- bridge supports
- mountain roads
In a crash test, a crash barrier is a rigid or deformable obstacle against which a car is impacted, or which impacts a car to be crash tested. To meet Wikipedias quality standards, this article or section may require cleanup. ...
The design of the road barrier is generally such that a vehicle hitting the barrier is steered back onto the road. This may be achieved by designing the supports so that they break off on impact, allowing the barrier to deform and push the vehicle back on track. In some cases cost cutting has led to a failure of this mechanism, with so-called "duck-nesting" (after the shallow nature of a duck nest) of barrier support bases. When this happens the supports tilt over at the base instead of breaking off, allowing the barrier to collapse and the vehicle to go over the barrier. Motorcycles are very vulnerable to crash barriers. Large vehicles with a high centre of gravity, such as Sport utility vehicles, are also vulnerable to going over barriers on impact. A fourth-generation (2006-) Ford Explorer, the best-selling mid-size SUV in the United States. ...
To prevent heavy vehicles going through or over the barrier and still maintain a low impact severity level, more stable systems like the German Super-Rail™ have been developed since the 1990s. It is tested to hold up and lead back trucks up to 40 tons while causing as low damage to smaller vehicles as the standard system of the 1930s.
 Super-Rail™ Crash Barrier (left; on the right: standard spaced guardrail) There is a variety of crash barriers: steel barriers are the prevalent sort but many environmental crash barriers and steel-wood guardrails have been introduced worldwide over the past few years. Image File history File links No higher resolution available. ...
Image File history File links No higher resolution available. ...
See also
Jersey wall on the Woodrow Wilson Bridge near Washington, D.C. A Jersey barrier or Jersey wall separates lanes of traffic (often opposing lanes of traffic) with a goal of minimizing vehicle crossover in the case of accidents. ...
A system designed to keep people or vehicles from (in most cases unintentionally) straying into dangerous or off-limits areas. ...
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