2009/03/18 
THIS and THAT 
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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 husdal.com is a gateway to literature reviews of journal articles, research papers, books, websites and other resources in Supply Chain Risk, Business Continuity, and Transport Vulnerability, personally collected and reviewed by Jan Husdal.
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This book, 
, by Anthony Boardman et al. is a heavy read. It is not a book you would want to read from A to Z in order to understand Cost-Benefit Analysis or CBA, but it is one of the better reference books I have found. The only downside I found was a very theoretical approach and lack of really useful examples. Nevertheless, not one element of CBA seems to be left untouched. This book is a valuable reference to anyone relying on CBA as a decision-making tool, because it will assist you in understanding what it is that you are analyzing when applying CBA.
This paper introduces vulnerability as an important parameter for decision-support in costbenefit analyses for transportation projects, by seeking to establish a link between the terms reliability and vulnerability vis-à-vis costs and benefits. The paper contends that a reliable transportation network represents a net benefit to society, and conversely, that a vulnerable network represents a net cost to society. Vulnerability costs or disruption costs are related to both location on and usage of the transportation network, and methods to explore these costs are suggested.
Looking beyond the science of vulnerability assessments, this paper discusses some of the network attributes that influence the vulnerability of transport networks, influences that can be described as structure-related, nature-related or traffic-related attributes. The paper introduces vulnerability as a parameter for decision-support in cost-benefit analyses, by seeking to establish a link between the terms reliability and vulnerability vis-a-vis costs and benefits.
Issues of reliability and vulnerability are mormally not considered a matter of evaluation in traditional cost-benefit analyses. Consequently, traditional cost-benefit analyses are lacking decision variables that may be important. This paper looks beyond the abstract science of vulnerability assessments, and discusses some of the factual influences and network attributes that contribute to the vulnerability of transport networks. The influences of the individual attributes are then examined as a measure of the vulnerability of a transport network. Although reliability can be defined by absolute numbers, vulnerability, by its very nature can not. The paper further outlines a framework for developing a methodology that to incorporate reliability and vulnerability as parameters for decision-support in a cost-benefit analysis. In doing so, this paper seeks to establish a link between the terms reliability/vulnerability and cost/benefit and seeks to describe reliability and vulnerability in terms of cost and benefit. Cost-benefit evaluations are part of many decision making processes, and it is argued that vulnerability assessments likewise should play an important role as input to these processes.
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