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THE TRAFFIC ENGINEER AS AN EXPERT WITNESS

Traffic and transportation engineers are now becoming increasingly involved in legal matters. This article discusses how the traffic engineer can prepare for the challenging role of an expert witness. It outlines and discusses the various types of data and information needed, the documentation and evaluation of the data, and the presentaion of the data for expert testimony. Dos and don'ts are identified that should help improve the effectiveness of the expert witness. The article discusses the meaning of the term, "expert witness," and such aspects as the accident investigation, use of technical references, traffic engineering studies, documentation of information, and the human factor aspect.