Clemens Kielhauser


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Kielhauser

First Name

Clemens

ORCID

0000-0003-1385-9909

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Publications 1 - 10 of 32
  • Estimating, and setting targets for, the resilience of transport infrastructure
    Item type: Journal Article
    Adey, Bryan T.; Martani, Claudio; Kielhauser, Clemens; et al. (2021)
    Infrastructure Asset Management
    To ensure that transport infrastructure provides acceptable levels of service with respect to extreme events, the resilience of the infrastructure needs to be estimated and targets for it need to be set. In this paper, the methodology proposed in the Foresee EU research project is presented. The methodology allows managers to measure, and set targets for, the resilience of transport systems in all situations. It requires clear definition of the transport system and how the service provided and the resilience are to be measured. The methodology allows consideration of the fact that transport infrastructure managers need to estimate resilience with various degrees of accuracy depending on the specific problem to be addressed, the time frame at disposition and the expertise available. These various levels of accuracy are covered by proposing the use of (a) simulations, (b) indicators whose values are directly related to increases in expected restoration intervention costs and reductions in service, and (c) the percentage of fulfilment of indicators. Once resilience has been estimated, the methodology provides guidance on how to set resilience targets with or without cost–benefit analysis. For demonstration, the explanation of the steps of the guideline is supported by their use for a simple transport system.
  • Wider view over bicycle crashes: Complementing and extending bicycle crash statistics in urban areas using surveys
    Item type: Journal Article
    Ringel, Laura; Kielhauser, Clemens; Adey, Bryan T. (2023)
    Journal of Safety Research
    Introduction: In pursuit of sustainability goals, many cities are introducing measures to increase the usage of bicycles as a means of transportation. City planners aim to ensure that this increase does not lead to an increase in crashes, but must make corresponding infrastructure decisions with limited information. Sufficient data to perform a statistical analysis of location-specific crash frequencies is rarely available. For example, only approximately 10% of all bicycle crashes are reported to the police (Shinar et al., 2018). Therefore, urban planners often rely on expert opinion, which may lead to suboptimal prioritization and realization of infrastructure improvements. Method: This paper demonstrates how surveys on bicycle crashes can be used to aid urban planners in making infrastructure decisions. In addition to confirming the location and characteristics of reported crashes, surveys can uncover characteristics of crashes that are not reported to the police, situations in which a crash almost occurred, and locations perceived by cyclists to be dangerous. Surveys also allow urban planners to investigate non-infrastructure related causes of crashes, such as the frequency with which individual cyclists use other modes of transportation. Practical Applications: The usefulness of surveys in the determination of urban cycling safety is demonstrated in this paper through analysis of survey results from the city of Zurich in 2018.
  • Genügender und effizienter Strassenunterhalt
    Item type: Other Conference Item
    Richmond, Craig; Kielhauser, Clemens; Adey, Bryan T. (2014)
  • Consideration of increased failure probabilities during interventions on multiple networks
    Item type: Other Conference Item
    Kielhauser, Clemens; Lethanh, Nam; Adey, Bryan T. (2014)
  • Ein Weg zu automatisiertem Infrastrukturmanagement
    Item type: Conference Paper
    Kielhauser, Clemens; Adey, Bryan T. (2018)
    Tagungsband zum 29. BBB-Assistententreffen – Fachkongress der wissenschaftlichen Mitarbeiter der Bereiche Bauwirtschaft, Baubetrieb und Bauverfahrenstechnik : Beiträge zum 29. BBB-Assistententreffen vom 06. bis 08. Juni 2018 in Braunschweig
  • FORESEE – D1.1: Guideline to measure service provided by, and resilience of, transport infrastructure
    Item type: Report
    Adey, Bryan T.; Martani, Claudio; Kielhauser, Clemens; et al. (2019)
  • A Methodology to Determine Optimal Intervention Programs for Multiple Urban Infrastructure Networks with a Consistent Representation of Service Levels
    Item type: Other Conference Item
    Adey, Bryan T.; Kielhauser, Clemens (2017)
    The determination of optimal intervention programs for municipal infrastructure networks, such as road, gas and water distribution networks is a challenging task. To find optimal intervention programs, it is necessary to take into consideration not only 1) the costs of interventions in terms of owner costs, but also 2) the potential loss of service both before, during and after the execution of the interventions, e.g. a failure due to differential loading of underground of pipes, and 3) the costs due to the loss of service when interventions are being executed, e.g. the consequences related to falls in water pressure or the consequences of a stoppage of electric current. As municipalities consist of multiple overlapping networks, it is also necessary to take into consideration that: 1) reductions in costs of intervention are possible when interventions are executed on multiple networks simultaneously, e.g. the replacement of the water and sewer pipes under one road are lower if they are done together than separately because the road only has to be opened once, and 2) interventions on one network can increase the probability of failure of another network, e.g. a backhoe can accidentally hit the water distribution pipe if it is being used to remove the soil necessary to excavate the gas pipe. In this paper, a methodology is presented that can be used to determine optimal intervention programs for multiple urban infrastructure networks simultaneously, taking into consideration these issues. Special emphasis is made on the new generic model for loss of service that can be used for all networks. The methodology is then critically discussed and recommendations for future work are given.
  • Guideline to measure service provided by, and resilience of, transport infrastructure
    Item type: Conference Paper
    Adey, Bryan T.; Martani, Claudio; Kielhauser, Clemens; et al. (2020)
    In order to optimally allocate resources to help ensure that transport infrastructure networks continue to provide acceptable levels of service immediately, or as fast as possible, following the occurrence of extreme events, the resilience of the infrastructure need to be estimated. In this paper, a guideline is presented, based on (Adey et al., 2019), that allows managers to measure the resilience of infrastructure networks. The guideline emphasizes that to this scope it is required to define clearly: (i) the transport system, and the way to consistently measure (ii) the service and (iii) the resilience. Particular attention is paid on the fact that resilience can be measured with various degrees of precision depending on the specific problem to be addressed, the time-frame at disposition and the expertise available. Guide are then given on how to do this either using simulation, indicators, or the percentage of fulfilment of the resilience indicators.
  • Development of intervention programs for inland waterway networks using genetic algorithms
    Item type: Journal Article
    Kielhauser, Clemens; Martani, Claudio; Adey, Bryan T. (2018)
    Structure and Infrastructure Engineering
Publications 1 - 10 of 32