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Safety at work
Published in Malcolm Copson, Peter Kendrick, Steve Beresford, Roadwork, 2019
Malcolm Copson, Peter Kendrick, Steve Beresford
Roadworks invariably affect traffic using a road by causing temporary restrictions, which may result in either partial or complete obstruction of the highway, whether on the verge, the hard shoulder, the footway, cycleway or carriageway. These works may affect the safety and free movement of vehicles, cyclists and pedestrians (particularly persons with mobility impairments). All reasonable steps should be taken to ensure that the effects of the roadworks on the public are reduced to a minimum, especially by giving clear and early warning of any obstructions.
Development of a functional priority index for assessing the impact of a bridge closure
Published in Joan-Ramon Casas, Dan M. Frangopol, Jose Turmo, Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability, 2022
M. Arena, G. Azzone, V.M. Urbano, P. Secchi, A. Torti, S. Vantini
From a methodological point of view, we provided different levels of impact assessments, evaluating the impact of a bridge closure by means of a global index (which can be used for ranking) and exploring both its temporal and spatial effects. From a temporal point of view, we evaluated how the impact of a bridge closure varies according to the time of the day. From a spatial point of view, we evaluated how the impact of a bridge closure is distributed over origins and destinations. This has been obtained by modeling a road network as a time-varying graph with fixed nodes and with functions as weight of the edges. The analysis of the results allows to identify the most critical bridges of the region, highlighting for each bridge the most impacting hours of the day. These results are useful for anticipating the damage on the users caused by maintenance interventions on road infrastructures and planning the maintenance activities in a context where resources are limited and should be properly allocated. The information on the spatio-temporal effects of a bridge closure can be passed before the bridge closure to the stakeholders of the affected origins and destinations, limiting the inconvenience to the travelers. Moreover, the same information can be instrumental in optimizing the road maintenance schedule. For example, knowing the most impacting hours of the day for each bridge closure, road works can be planned by choosing the timeslots in which to do the maintenance work or by opening and closing the lanes of the road accordingly to mitigate the effects of its closure. Indeed, the developed methodology has proved to be scalable and repeatable, thus ready to be extended to a larger set of bridges and to be applied to other contexts. Specifically, the proposed methodology can be applied to other geographical areas in order to evaluate the impact of bridge closure or extended to any other road infrastructure that can be modeled as a directional edge, such as tunnels and overpasses, or as a set of connected directional edges in the road network model including road sections.
Development of a precast slim temporary concrete safety barrier STCSB 50 for work zone applications
Published in Journal of Transportation Safety & Security, 2019
Ali Osman Atahan, Turan Arslan, Wolfgang Ganster, Thomas Edl
Selecting appropriate safety barriers with reasonably high containment level and low deflection characteristics for road-work zone areas is vital for the safety of motorists and work zone crew alike. Installing most effective and safest system is fundamental for authorities and traffic managers to not compromise on safer working places while preventing severe accidents. In Europe, there are many efforts to achieve T3 containment level barriers with working width levels as small as W2 to maximize technical requirements.