ABSTRACT
In the Netherlands many objects in the national infrastructure are reaching or have reached the end of their designed lifespan. To ensure sufficient budget for replacement or renovation, an estimation of costs for the next 30 years is needed. This requires an estimate of the year of end-of-service life and an estimate of replacement costs. As Rijkswaterstaat is responsible for 64.000 structures, in addition to roads and waterways, an in depth investigation of each object is not feasible. Therefore, we use a combination of three methods. To estimate the costs of replacing or renovating an object we make use of the key figures that are derived from building new objects. However a replacement or renovation comes with different challenges. Furthermore there are some unknown cost variables. The paper also describes how the 2022 estimation process differs from the previous years.
