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  • 1.
    Andersson-Sköld, Yvonne
    et al.
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Mirzanamadi, Raheb
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Nyberg, Erik
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Erlingsson, Sigurdur
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Torstensson, Peter
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment. Swedish National Road and Transport Research Institute, Traffic and road users, Vehicle Systems and Driving Simulation..
    Göransson, Gunnel
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Nordin, Lina
    Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.
    Ramverk för att prioritera och bedöma nyttan av klimatanpassningsåtgärder2023Report (Other academic)
    Abstract [en]

    Even if the greenhouse gas emissions are rapidly reduced, the ongoing climate change will result in extensive and costly climate-related events that will occur more frequently. The costs in the Swedish transport sector for such events damaging streets, roads, rail/railways, and other vulnerable parts of the infrastructure are high today and are expected to increase. The consequences of weather-related events are, among other things, reduced accessibility, and increased risk of accidents. To maintain the functioning of the transport system, it is important to undertake risk-reducing measures related both to today's climate, but above all, to manage future climate-related events. It is necessary to ensure the functioning of the transport system during extreme weather events, and during periods of prolonged precipitation, prolonged heatwaves and changing precipitation patterns. It is also important to enable adaptation measures to deal with long-term changes such as rising sea levels which affect the accessibility and lifespan of the infrastructure.

    This report presents a summary of results and a summary of how a framework for evaluating climaterelated impact relationships has been used. Effect relationships refer to identifying, assessing, and evaluating climate-related risks and risk reduction measures. In this report, the focus is on identifying, assessing, and evaluating the effectiveness of climate-related measures. The results is a framework for assessing the effect of risk-reducing measures, i.e., to assess whether it is relevant to implement a measure, when in time it should be implemented and to assess which measure is most relevant to implement. The risks have considered in case studies and include fire risk, risk of accidents on streets and roads due to zero crossings or heat, flooding, erosion and landslides and impact on road construction (rutting, bearing capacity and fatigue), track buckling and risks related to high winds. The tests have included hazard and risk identification, risk analysis, identification, and evaluation of possible measures. Examples of case studies are a torrential rain in Kungsbacka municipality in 2019, erosion-related changes over a long period of time at Österdalälven and calculations of climate impact on the road construction at the E10 at Svappavaara. A case study has also included monetary valuation and sensitivity analysis. The framework has also formed the basis for a discussion regarding climaterelated risks linked to electricity supply.

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  • 2.
    Andersson-Sköld, Yvonne
    et al.
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Norrman, Jenny
    Chalmers Tekniska Högskola.
    Patrício, João
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Mirzanamadi, Raheb
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Claesson, Joakim
    Trafikverket.
    Masshantering: indikatorer och nyckeltal för incitament för reducerad klimatpåverkan vid upphandling2022Report (Other academic)
    Abstract [en]

    Methodology for controlling circular mass handling in the Swedish Transport Administration is focused on elements that are carried out in the design phase. There is a lack of methodology for how indicators and key performance indicator can be transferred to the contractor. To improve requirements and incentives in contract procurements, requirements that are procurable and which can be followed-up must be developed. 

    The purpose of this project is to, in a feasibility study, develop proposals for indicators and key performance indicators for procurement that can be used to set requirements and provide incentives that can be introduced in the Swedish Transport Administration's procurements to improve mass management, both in the planning of projects and in the actual execution. Future requirements and incentives should be able to be used in procurements and thus contribute to entrepreneurs working more circularly, sustainably and innovatively with mass handling than at present. The main purpose is that the procurement procedure should contribute to achieving the Swedish Transport Administration's goal: the infrastructure should be climate neutral by 2045. 

    The work consists of an analysis based on international and national literature, mass management reporting and interviews. 

    Based on the collected material, it appears that the regulations regarding excavated masses are not clear, and that the masses are classified as waste in most countries. This, in turn, leads to excavated masses not being recycled as much as is theoretically possible, nor as optimally as possible according to the value chain. To improve this, clearer incentives, indicators and key performance indicators are required, as well as accounting tools and guidance material from the Swedish Transport Administration. In this project, proposals for indicators and key performance indicators have been developed. In addition, an Excel based prototype for how several of these indicators can be reported both before a procurement and to be used to follow up and evaluate mass management in a project has been developed. The report also provides suggestions for continued work to develop the prototype for evaluating mass management at the project level and from a socio-economic perspective.

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  • 3.
    Mirzanamadi, Raheb
    et al.
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Gustafsson, Mats
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Users’ experiences of tyre wear on electric vehicles: a survey and interview study2022Report (Other academic)
    Abstract [en]

    Electrification of vehicles is considered as a solution to reduce climate gas emissions as well as locally emitted air pollution components due to zero exhaust emissions. Also brake wear emissions are expected to be reduced due to the use of regenerative2 braking. However, electric vehicles (EVs) have higher and more direct torque and can therefore accelerate fast. They are also generally heavier than equivalent internal combustion engine vehicles (ICEVs). These properties are hypothesized to lead to higher non-exhaust emissions from tyre and road wear as well as higher resuspension of road dust. On the other hand, driving behaviour in EVs might differ due to e.g. driving range issues. 

    This study aims at investigating users’ experiences with tyre wear of EVs, Plug-in Hybrid Electric Vehicles (PHEVs) and Hybrid Electric Vehicles (HEVs). The study was done using web-based inquiries and interviews. Two formats of surveys, one for private users and one for professional users were prepared. The professional survey included taxi, bus transport and car rental companies. The survey to private owners was communicated to the public using an ad on Facebook and the survey to professional users was sent by emails to companies. Furthermore, some interviews were done by professional users. 307 users answered the survey to private users and 28 companies answered the survey of professional users. Furthermore, six representatives for companies were interviewed. 

    The results showed that approximately 33% of private users and 12.5% of professional users experienced faster tyre wear in their EVs/HEVs/PHEVs, compared with tyre wear in ICEVs. Generally, for all electric vehicle types, most professional users experience similar tyre wear as for ICEVs. Vehicle acceleration and weight are the two most commonly mentioned reasons for faster tyre wear, while driving behaviour is the most commonly answered reason for slower tyre wear, compared to tyre wear in ICEVs

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  • 4.
    Mirzanamadi, Raheb
    et al.
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Nyberg, Erik
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Torstensson, Peter
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment. Department of Mechanics and Maritime Sciences / CHARMEC, Chalmers University of Technology, Sweden.
    Andersson-Sköld, Yvonne
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment. Department of Architecture and Civil Engineering, Chalmers University of Technology, Sweden.
    Lateral Track Buckling in Sweden: Insights from Operators and Infrastructure Managers2024In: CivilEng, E-ISSN 2673-4109, Vol. 5, no 1, p. 136-149Article in journal (Refereed)
    Abstract [en]

    Rail transport is expected to become a key component in the development of a long-term sustainable transport system. The planning, construction, operation, and maintenance of railway infrastructure are crucial in this effort. Hence, it is essential to ascertain that the railway infrastructure withstands and is adapted to extreme weather conditions and climate change. This study focuses on evaluating climate adaptation measures for lateral track buckling in Sweden. Through a literature review and interview with an expert at Swedish Transport Administration, it is highlighted that the maintenance status of railway infrastructure plays a significant role in the occurrence of lateral track buckling. According to the expert, inadequate track maintenance is the primary cause of lateral track buckling rather than weather variables like air temperature. The interview also clarifies that the chain of events related to the handling of track buckling is mainly initiated by the observation of a discrete lateral irregularity by a train driver, whereupon the train dispatcher at the traffic management center stops traffic until the location in the track has been inspected by a track entrepreneur. During the inspection, up to half of the observed cases of track buckling turn out to be false.

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