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Visar resultat 1 - 5 av 11 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Predictive models for accidents on urban links - A focus on vulnerable road users

    Författare :Thomas Jonsson; Trafik och väg; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Road transport technology; Transportteknik; Transport technology; Teknik; Technological sciences; Stads- och glesbygdsplanering; Town and country planning; speed; links; urban; safety; vulnerable road users; modelling; prediction; crash; traffic safety; accident; Vägtransportteknik;

    Sammanfattning : Much of earlier work on predictive models for accidents has been focused on rural traffic or urban intersections. This work has aimed at identifying and investigating possible improvements to predictive models for accidents on urban links. A special focus has been on the accidents of vulnerable road users. LÄS MER

  3. 2. Designing Urban Road Congestion Charging Systems : Models and Heuristic Solution Approaches

    Författare :Joakim Ekström; Jan Lundgren; Anders Karlström; Linköpings universitet; []
    Nyckelord :transport modeling; congestion pricing; network design; bi-level optimization; toll locations; traffic assignment; user equilibrium; collection cost; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : The question of how to design a congestion pricing scheme is difficult to answer and involves a number of complex decisions. This thesis is devoted to the quantitative parts of designing a congestion pricing scheme with link tolls in an urban car traffic network. LÄS MER

  4. 3. Analysis of side friction impacts on urban roads : Case study Dar-es-Salaam

    Författare :Masatu L. M. Chiguma; Karl-Lennart Bång; Christer Hydén; KTH; []
    Nyckelord :Side friction factors; urban road links; speed-flow relationships; macroscopic method; microscopic method; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP;

    Sammanfattning : Side friction factors are defined as all those actions related to the activities taking place by the sides of the road and sometimes within the road, which interfere with the traffic flow on the travelled way. They include but not limited to pedestrians, bicycles, non-motorised vehicles, parked and stopping vehicles. LÄS MER

  5. 4. Speed characteristics of urban streets based on driver behaviour studies and simulation

    Författare :Karin F. M. Aronsson; Karl-Lennart Bång; Bengt Holmberg; KTH; []
    Nyckelord :Speed; Characteristics; Urban area; Road network; Street; Traffic; Driver; Side-friction element; Driving simulator; Simulation; Measurement; Behaviour; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : The objective of the study was to gain in-depth knowledge of speed relationships for urban streets. The speed characteristics were examined using a number of methods for data collection. LÄS MER

  7. 5. Dagligvarudistributionens strukturomvandling : Drivkrafter och konsekvenser för städers utformning och miljö

    Författare :Tomas Svensson; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; wholesaling; retailing; town planning; structural change; food; groceries; out-of-town supermarkets; cartrips; urban environment; technological change; Linköping; Sweden; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : The purpose of this study is to describe and analyse the dramatic structural changes in the wholesaling and retailing of food and groceries in towns and cities in Sweden, with emphasis on the period after the Second World War. Besides a general analysis based on national data, the town of Linköping is used to illustrate the spatial dimension in the development of food distribution at the micro level. LÄS MER