Conclusion

Abstract

Infrastructure is an important investment asset worldwide. Currently, about 8 % of the global GDP is spent on very large infrastructure projects, and more and more of such investments are locked in bigger and bigger projects (Flyvbjerg 2014). As projects get bigger, so does the problem of time delays and cost overruns. Many infrastructure projects are under construction in developing countries, which often lack resilience and capacity to shoulder such complex endeavors, and are hence more vulnerable to these risks (Ansar et al. 2014). Many Western states, too, face an investment bottleneck in maintenance and refurbishment as roads, rails, tunnels, and bridges are aging. Allocating resources properly becomes especially important, as insufficient investment budgets necessitate more efficient spending. But this study has shown that there is significant need for improvement also in Germany to avoid waste of resources urgently needed for maintaining existing infrastructure.