Sökning: "Statens väg- och transportforskningsinstitut."

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden Statens väg- och transportforskningsinstitut..

  1. 1. Modelling and Simulation for Evaluation of Cooperative Intelligent Transport System Functions

    Detta är en avhandling från Halmstad : Halmstad University Press

    Författare :Maytheewat Aramrattana; Högskolan i Halmstad.; Statens väg- och transportforskningsinstitut.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 23 Road: ITS och traffic; 23 Road: ITS och traffic; Cooperative ITS; Autonomous driving; Traffic mixture; Simulation; Adaptive cruise control; Platooning electronic ;

    Sammanfattning : Future vehicles are expected to be equipped with wireless communication technology, that enables them to be “connected” to each others and road infrastructures. Complementing current autonomous vehicles and automated driving systems, the wireless communication allows the vehicles to interact, cooperate, and be aware of its surroundings beyond their own sensors’ range. LÄS MER

  2. 2. Mechanistic-Empirical Modelling of Flexible Pavement Performance Verifications Using APT Measurements

    Detta är en avhandling från Stockholm : US-AB

    Författare :Abubeker Worake Ahmed; KTH.; Statens väg- och transportforskningsinstitut.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transportvetenskap; Transport Science; Civil and Architectural Engineering; Byggvetenskap; Flexible Pavement; Pavement Performance Models; Multilayer Elastic Theory; Linear Viscoelasticity; Rutting; Accelerated Pavement Testing; Heavy Vehicle Simulator; Road: Pavement design; Road: Pavement design; Performance; Deformation; Model not math ; Rutting wheel ; Viscoelasticity; Elasticity; Axle load; Flexible pavement; Laboratory not an organization ; Test; Thesis; Heavy vehicle simulator; Wheel tracking test;

    Sammanfattning : Mechanistic-Empirical  (M-E)  pavement  design  procedures  are  composed  of  a  reliable  response model to estimate the state of stress in the pavement and distress models in order to predict the different types of pavement distresses due to the prevailing traffic and environmental conditions. One of the main objectives of this study was to develop a response model based on multilayer elastic  theory   (MLET)  with  improved  computational  performance  by   optimizing  the   time consuming parts of the MLET processes. LÄS MER

  3. 3. Modeling pavement performance based on data from the Swedish LTPP database predicting cracking and rutting

    Detta är en avhandling från Stockholm : Kungliga tekniska högskolan. Institutionen för transportvetenskap

    Författare :Markus Svensson; KTH.; Statens väg- och transportforskningsinstitut.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; performance predictions; LTPP; rut; crack; statistical modeling; 32 Road: Pavement design; 32 Road: Pavement design; Cracking; Rutting wheel ; Prediction; Calculation; Mathematical model; Flexible pavement; Performance; Sprickbildning; Spårbildning; Förutsägelser; Beräkning; Matematiska modeller; Flexibla överbyggnader; Prestanda;

    Sammanfattning : The roads in our society are in a state of constant degradation. The reasons for this are many, and therefore constructed to have a certain lifetime before being reconstructed. To minimize the cost of maintaining the important transport road network high quality prediction models are needed. LÄS MER

  4. 4. Competition in Public Transport Essays on competitive tendering and open-access competition in Sweden

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Andreas Vigren; KTH.; Statens väg- och transportforskningsinstitut.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Transportvetenskap; Transport Science; Competition; Public Transport; Tendering; Procurement; Cost efficient; Bus; Railway; Open access competition; 02 Road: Economics; 02 Road: Economics; 111 Road: Public transport; 111 Road: Public transport; J13 Railway: Economics; J13 Railway: Economics; Public transport; Contract; Tender; Economic efficiency; Location; Transport operator; Depot transp ; Impact study; Line transp ;

    Sammanfattning : The results of this work show that the cost efficiency of tendered bus services is similar across all Swedish counties, except for the more high-density counties where efficiency is lower. Considerably lower efficiency is also found for contracts with services run in-house by the Public Transport Authority (PTA), compared to when the same service is run by a private actor. LÄS MER

  5. 5. Effects of hearing loss on traffic safety and mobility

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Birgitta Thorslund; Linköpings universitet.; Linköpings universitet.; Linköpings universitet.; Statens väg- och transportforskningsinstitut.; [2014]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Hearing loss; traffic safety; cognitive workload; tactile support; Hörselnedsättning; trafiksäkerhet; kognitiv belastning; taktilt stöd; 841 Road: Road user behaviour; 841 Road: Road user behaviour; Hearing; Driver; Driving veh ; Behaviour; Cognition; Mental load; Eye movement; Tactile; Warning; Signal; Driver assistance system; Navigation route ; Simulator driving ; Test; Safety;

    Sammanfattning : Syftet med den här doktorsavhandlingen var att undersöka trafiksäkerhet och mobilitet för individer med hörselnedsättning (HN). Tre studier har genomförts: 1. en enkätstudie för att undersöka skillnader i transportvanor relaterade till HN, 2. LÄS MER