Streamlining and deepening of insight : the results of the action programme OEI. Since 2000 it is mandatory to draft an 'Overview of Effects of Infrastructure' (OEI), based on cost-benefit analysis, when preparing for decision-making in major transport infrastructure projects. This so-called guideline OEI has been evaluated and this has resulted in proposals for a number of process-related and content related improvements. These proposed improvements have been addressed in the Supplements to the guideline OEI. The process-related improvements are about transparent presentation of the OEI cost benefit results and about the proper embedding of OEI in the policy decision-making process. The content related improvements concern a variety of subjects covering both direct and indirect effects: direct effects: various methodological points of interest; indirect effects: definition and options for quantification; nature impacts: definition and options for quantification; distribution impacts: how to give insight in consequences for groups and/or regions as the cost benefit analysis only shows the national overall impacts ?; risk assessment: embedding in OEI of the advise of Commission on Risk assessment. This paper contains a summary of the proposed improvements, both process related and content related. (Author/publisher)
Samenvatting