This is a philosophical essay on transportation vulnerability, where three fields or subjects are brought together : engineering (reliability and vulnerability), economics (cost and benefits) and politics (decision making). The idea behind the research is to blend statistical, economical and political arguments in order to achieve a novel and unifying framework for decision making within transportation planning. By adding reliability and vulnerability to the traditional equations of costs and benefits it is hoped that transportation planners and professionals will not only consider economical arguments, but also dare to take on political statements that may be in opposition to strictly factual costs and benefits.

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