Forensic Engineers and Consultants

Tag Archive: pedestrian

  1. The Best Use of Visibility Aids – Contrast

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    There are various visibility aids marketed for vulnerable road users (VRUs). Here, the term VRU is used to describe unprotected road users such as pedestrians and bicyclists. Visibility aids are designed to increase a VRU’s contrast within their environment, making them more distinguishable from the background to a driver. These visibility aids can include both active and passive ways to increase the VRU’s contrast, therefore their visibility. As the name implies, active visibility aids actively transmit light and are powered by a source (i.e., battery powered bicycle headlights and taillights) while passive visibility aids passively reflect light coming from outside sources (i.e., fluorescent, and retroreflective clothing).

    There are a wide variety of active visibility aids to choose from on the market. For example, (more…)

  2. Fire Investigation Points to Design Failure.

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    Defects that cause problems in machines are categorized into two different concepts. Manufacturing defect is a term that applies to a situation where the defect was unintended. For example, a part was installed that did not meet the designer’s specifications or quality. A design defect is another matter. Design defect is a term that applies to a situation where the defect resulted from a purposeful decision or by failing to investigate or heed available design criteria on the part of a designer or builder. (more…)

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