![]() Project preparation is the final stage where the economic benefits of road schemes are analysed prior to implementation. Work Programming involves the preparation, under budget constraints, of multi-year road work and expenditure programmes in which sections of the network likely to require improvement, are identified and prioritised. The purpose was to build the capacities of the chief engineers at the Ministry of Development, Investment and International Cooperation and at the Ministry of Equipment, Housing and Territorial. Strategic planning involves the analysis of the road system as a whole, typically requiring the preparation of long term, or strategic, planning estimates of expenditure for road development and preservation under various budgetary and economic scenarios. A tailor-made training course financed by the World Bank and entitled « Introduction to the HDM4 software » took place in Tunis in April 2018. The paper describes the HDM-4 software applications developed to cater for the following components within the highway management process: Strategic Planning, Work Programming, and Project Preparation. The scope of the new HDM-4 tools have been broadened considerably beyond traditional project appraisals, to provide a powerful system for the analysis of road management and investment alternatives. This has resulted in the development of a new set of Highway Development and Management Tools collectively referred to as HDM-4. ![]() ![]() An international study has been carried out to extend the scope of the World Bank HDM-III model, and to provide a harmonised systems approach to road management, with adaptable and user-friendly software tools. ![]()
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