Page 182 - RoadCem Manual - PCT BV

Figure 6.24 Low level drift. Figure 6.25 Vented drift.
The road system represents a major investment and is one of the largest public sector assets, with very high replacement costs. Indeed the asset value of the road system often exceeds the combined value of all the other surface transport systems. Therefore, it is extremely important that this asset be preserved through effective and efficient management. In the absence of this, the investment can be eroded quite quickly because roads that are not maintained deteriorate very rapidly.
Even for relatively low-trafficked road networks, reliable information has become essential for effective management. This has led to the development of management tools, including various types of road management systems, that assist roads agencies in allocating resources in a manner that achieves the best value for money. However, to be sustainable, such systems should be carefully chosen to match the available resources - both technical and financial - of the roads agency. Unfortunately, there are a number of examples of systems which have failed to work satisfactorily. In table 6.2 there is given a bief summary about aspect concening Road Safety, Road User Costs and Life Cycle Costs.
182