... area. However, nothing is perfect and the computer programmes also have drawbacks which will be discussed in this report. Contents Page Abstract 1.0 Introduction 1 2.0 HDM-4 2-4 2.1 System Architecture 2 2.2 Road Management Function 2-4 2.2.1 Planning 3 2.2.2 Programming 3 2.2.3 Preparation 3 2.2.4 Operation 3-4 3.0 ARCADY 5 4 4.0 Test of HDM-4 and ARCADY 5 4-6 4.1 HDM-4 4-5 4.1.1 Results 5 4.2 ARCADY 5-6 4.2.1 Results 6 1.0 Introduction IT tools are widely used in many fields now. In the road management and engineering field, IT tools are especially vital and useful because road congestion and road accidents attribute billions of dollars in a country each year. For economical and environmental issues, uses of IT tools can efficiently reduce the social and economic loss due to the congestion and accidents, and mitigate the environmental impact from vehicles. The Highway Development and Management Tools (HDM-4) is a software system for investigating choices in investing in road transport infrastructure. It was developed on the basis of HDM-3. These choices may include developing new roads, improving ...

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