Journal: Case Studies on Transport Policy

Abbreviation

Publisher

Elsevier

Journal Volumes

ISSN

2213-624X
2213-6258

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2016 - 201942020 - 20253
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Publications 1 - 7 of 7
  • Network-level cycling infrastructure cost and crash risk estimates in early planning stages: A Zurich case study
    Item type: Journal Article
    Zani, David; Adey, Bryan T. (2025)
    Case Studies on Transport Policy
  • Swiss highway project cost estimate performance: Deviations from norms and expected trends
    Item type: Journal Article
    Zani, David; Adey, Bryan T. (2024)
    Case Studies on Transport Policy
    Cost overruns in construction projects are a common issue internationally, and project cost performance in individual countries varies considerably. Countries that lack systematic project data may rely on foreign data for informing cost estimating practices and norms, which may lead to errors. This study considered the case of Switzerland, a country with limited research on construction project cost performance. Swiss highway construction projects were analysed to assess the accuracy of cost estimating methods and norms. Different factors influencing cost overruns were considered: project size, type, planning duration, start year, and historical policy changes. The results revealed that the general patterns of cost overruns observed internationally do not apply to Switzerland: 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). Projects exhibited large and asymmetrical cost accuracy ranges throughout the planning and construction phases. These results deviate from expectations set in norms and comparable international project data. Based on these findings, the study challenges the effectiveness of current Swiss cost estimating norms, suggesting a need for more country-specific data analysis and policy development.
  • Impact of radical bike lane allocation on bi-modal urban road network traffic performance
    Item type: Journal Article
    Fulton, Ellen J.; Ni, Ying-Chuan; Kouvelas, Anastasios (2025)
    Case Studies on Transport Policy
    To decarbonize urban transport systems, promoting active modes by allocating more road space to cycling infrastructure to achieve a radical modal shift has become a popular transport policy. However, such policies usually receive strong public opposition due to the concern of traffic congestion caused by reduced road capacity for motorized traffic. From a traffic engineering perspective, this study first aims to answer the question “how much modal shift it requires to counterbalance the impact of road space reallocation on network traffic flow” by conducting a microscopic traffic simulation case study. The city center of Zurich together with the E-Bike City (EBC) network designed in Ballo et al. (2024) is selected as the case study. Through analyzing the changes in origin–destination travel times and network fundamental diagrams, it is first found that congestion level increases significantly in the EBC network with minimal modal shift due to the reduced queue storage space on the roads for cars. In comparison to the situation in the status-quo network, a policy goal of an over fifty percent modal shift is required to mitigate the negative impact on traffic performance. However, congestion can be completely prevented in the large modal shift scenario by better utilizing the capacity of the bike lane network. The findings showcase a possible transition pathway toward a sustainable urban road environment and its outcomes for policymakers. The proposed simulation and analysis framework can also be used by future studies with a similar objective.
  • Privatization, outsourcing and public service objectives: An explorative analysis of two network industries
    Item type: Journal Article
    Lieberherr, Eva; Leiren, Merethe Dotterud (2017)
    Case Studies on Transport Policy
  • Influence of pricing on mode choice decision in Jakarta
    Item type: Journal Article
    Belgiawan, Prawira F.; Ilahi, Anugrah; Axhausen, Kay W. (2019)
    Case Studies on Transport Policy
  • Challenges and Future Research Needs towards International Freight Transport Modelling
    Item type: Journal Article
    Meersman, Hilde; Ehrler, Verena C.; Bruckmann, Dirk; et al. (2016)
    Case Studies on Transport Policy
  • Developing trans-European railway corridors: Lessons from the Rhine-Alpine Corridor
    Item type: Journal Article
    Otsuka, Noriko; Günther, Felix C.; Tosoni, Ilaria; et al. (2017)
    Case Studies on Transport Policy
Publications 1 - 7 of 7