New publication by PhD candidate David Zani in the Journal Case Studies on Transport Policy
Prof. Bryan T. Adey's Chair of Infrastructure Management congratulates PhD candidate David Zani on the publication of the article “Swiss highway project cost estimate performance: deviations from norms and expected trends” in the Journal Case Studies on Transport Policy.
In this article, David Zani challenges the effectiveness of current Swiss cost estimating norms and suggests a need for more country-specific data analysis and policy development. He does this by analysing the costs estimates for Swiss highway construction projects, considering project size, type, planning duration, start year, and historical policy changes, and showing that the general patterns of cost overruns observed internationally do not apply to Switzerland. More specifically, projects tend to overrun estimated costs during the planning phase but underrun during the construction phase, leading to accurate overall cost estimates (4.7% median overrun). He also shows that past projects have exhibited large and asymmetrical cost accuracy ranges throughout the planning and construction phases, something which also deviates from expectations set in norms and comparable international project data.
The Infrastructure Management Group mission is to improve the construction and management of infrastructure. For more information visit our webpage