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PIARC (World Road Association), founded in 1909 and comprising 125 member governments from all over the world, is the global forum for exchange of knowledge and experience on roads, road transport policies and practices. With consultative status to the Economic and Social Council of the United Nations, the Association is contributing to a stable and sustainable global development of the road and transport sector.

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Technical Reports Economic studies

This page lists technical reports of PIARC in the field of economic studies. These publications are classified chronologically.

  • Modelling Road User and Environmental Effects in HDM-4

    This document is the seventh volume in the series of seven volumes of HDM-4 documentation. It covers modelling road user and environmental effects (RUEE). The report presents an overview of how they are introduced in studies and describes representative vehicles. The second section deals with road user effects. It provides details on the various components of these effects: Forces opposing motion; Free speeds; Effects of volume on traffic flow; Fuel consumption; Tyre consumption; Maintenance [...]

  • Modelling Road Deterioration and Works Effects in HDM-4

    This document is the sixth volume in the series of seven volumes of HDM-4 documentation. It gives a detailed description of the road deterioration and works effects (RDWE) models currently in HDM-4 and provides some background to their development, particularly from HDM-III to HDM-4. Also included are possible enhancements to some of the models currently in HDM-4. In addition, other deterioration models are presented in this document for consideration in future versions. The general concepts and [...]

  • Economic Evaluation Methods for Road Projects in PIARC members countries

    PIARC Committee C9 on Economic and Financial Evaluation has prepared this report to present an up to date description and analysis of the methodologies used by PIARC member countries and international agencies for economic evaluation of road projects, the range and valuation of the impacts considered, and how the evaluations are accepted and used in decision making processes. The methodologies covered by this report are, in general, those used for evaluating capital investments at the project level. [...]

  • Planning and Programming of Maintenance Budgets

    Maintenance is essential to prevent the deterioration of asset value and ensure user safety. However, the budgets allocated for maintenance are often considered insufficient to keep the infrastructure at optimum levels. The reasons for this funding shortfall can be a lack of means within the road administration, but it can also be due to the poor justification of need to decision-makers. PIARC Committee C6 was asked to analyse, from a practical point of view, the options open to road administrations [...]