Sökning: "transport infrastructure"

Visar resultat 21 - 25 av 329 avhandlingar innehållade orden transport infrastructure.

  1. 21. Empirical Essays on Railway Infrastructure Costs in Sweden

    Författare :Mats Andersson; Lars-Göran Mattsson; John Preston; KTH; []
    Nyckelord :Railways; Infrastructure; Marginal Costs; Maintenance; Renewal; Econometrics; Panel Data; Survival Analysis; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP;

    Sammanfattning : The subject of this thesis concerns pricing the use of transport infrastructure. We are empirically investigating the relationship between railway traffic volumes and infrastructure management costs. More specifically, we are interested in estimating the change in infrastructure management costs from marginal variations in traffic volumes, i.e. LÄS MER

  3. 22. Granular Materials for Transport Infrastructures : Mechanical performance of coarse–fine mixtures for unbound layers through DEM analysis

    Författare :Ricardo de Frias Lopez; Johan Silfwerbrand; Jonas Ekblad; Björn Birgisson; Jörgen Johansson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; discrete element method; force distribution; gap-graded mixtures; granular materials; particle-scale behaviour; permanent deformation; resilient modulus; soil fabric; binära blandningar; diskreta elementmetoden; grusmaterial; kraftöverföring; verkningssätt på partikelnivå; permanent deformation; skelettstruktur; styvhet; Byggvetenskap; Civil and Architectural Engineering;

    Sammanfattning : Granular materials are widely used as unbound layers within the infrastructure system playing a significant role on performance and maintenance. However, fields like pavement and railway engineering still heavily rely on empirically-based models owing to the complex behaviour of these materials, which partly stems from their discrete nature. LÄS MER

  4. 23. Towards a sustainable road infrastructure in an age of digitization: opportunities and challenges

    Författare :Zhuhuan Liu; Nicole Kringos; Romain Balieu; Aikaterini (Katerina) Varveri; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sustainable infrastructure; Pavement Maintenance; Optimization; Neutron tomography; Self-healing; Hållbar infrastruktur; Vägunderhåll; Optimering; Neutronavbildning; Självläkning; Structural Engineering and Bridges; Bro- och stålbyggnad;

    Sammanfattning : Pavement system plays an indispensable role in the socio-economic and sustainable development of every modern society. Yet, pavement construction and maintenance is also responsible for a significant fraction of the GHG emissions from the whole transport sector. LÄS MER

  5. 24. Managing knowledge sharing of extreme weather induced impacts on land transport infrastructure : Case study of the Swedish Transport Administration

    Författare :Monika Rydstedt Nyman; Lars Nyberg; Magnus Johansson; Eva Liljegren; Peter Söderholm; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lessons learned; risk management; climate change adaptation; accident investigation method; extreme weather events; natural hazard; land transport infrastructure; maintenance; lärande; kunskapsåterföring; risk hantering; klimatanpassning; olycksutredningsmetod; naturolyckor; landtransport infrastruktur; underhåll; Risk and Environmental Studies; Risk- och Miljöstudier;

    Sammanfattning : Extreme weather events and effects of climate change are threats to the transport sector’s functionality and safety. Risk management in this context implies a necessity to focus on the connection between near-term experiences and coping strategies on one hand, and long-term adaptation analyses on the other. LÄS MER

  7. 25. A Piece of the Puzzle : Essays on Accessibility, Transport Infrastructure and Distribution

    Författare :Anders Bondemark; Henrik Andersson; Karin Brundell-Freij; Anders Wretstrand; Niek Mouter; Trafik och väg; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : .... LÄS MER