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Research comprises creative work undertaken on a systematic basis in order to increase the stock of knowledge, including knowledge of man, culture and society, and the use of this stock of knowledge to devise new applications. It is used to establish or confirm facts, reaffirm the results of previous work, solve new or existing problems, support theorems, or develop new theories. A research project may also be an expansion on past work in the field. To test the validity of instruments, procedures, or experiments, research may replicate elements of prior projects, or the project as a whole. - source

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Accident Reconstruction Research: Guard Rails

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Photographs and Descriptions of Guard Rails

The bullnose above has steel I-beams and will not cushion the crash. A crash on this bullnose could create more than 20 G's of force on the occupants of a vehicle.
This is a close up photo of the bullnose pictured above.
This terminal is an attenuating terminal and is very effective. There are some different modifications. When hit, this terminal flattens the W-beam rail and shoots it away from the car and driver. Kill and incapacitating rate close to 0%. We have heard of accidents at 75mph and the driver has walked away.
Flexbeam Guardrail
W-Beam guardrail is the most widely accepted, cost-effective highway safety barrier in the world.
The melt is a glorified BCT and has been redesigned and tested several times.
Pressure treatment is used extensively to protect the wood posts and blocks in our highway guardrail systems. Numerous crash tests have shown the properties of wood to be a safe and excellent support for the guardrail systems.
Threebeam Guardrail
Triple corrugated guardrail is used in Bridge protection and where increased impact strength is required.
This terminal was turned down into the ground to prevent spearing but causes many smaller cars to roll over. Rollovers are the most severe type of roadside crashes. Although rollovers occur in only 15% of roadside crashes, they are responsible for more than 25 percent of all roadside fatalities. Nearly 75% of all rollovers occur on rural two-lane roads that have limited right-of-way and were designed to meet older, less demanding standards. Kill and Incapacitating rate of turndown is 15-20%

Not finding what you are looking for?

The ARC Network is continually searching the Internet and other data sources to bring you the most accurate and fresh data available. As we continually build this area of our web site we would like to hear your suggestions for research topics and helpful web site links. Simply contact us via email or phone and we will review your suggestions.

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