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Pages 3-5

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From page 3...
... 3 definition of and data needs for an ISPE are addressed in the ISPE Guidelines Document. Consistency between states is also addressed in the ISPE Guidelines Document.
From page 4...
... 4 decades, the ISPE Guidelines Document is the first step in what is hoped to be an evolution of ISPE evaluation criteria that will continue into the future. Chapter 1 of the ISPE Guidelines Document outlines the purpose of the guidelines, the objectives of an ISPE, and the underlying philosophy of roadside safety feature design.
From page 5...
... 5 anywhere in the sequence of events. Using both single and multiple vehicle crashes was favored to ensure any events which lead to the studied outcomes are captured in an ISPE.

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