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  • 451. Warmelink, Harald
    et al.
    Bekebrede, Geertje
    Harteveld, Casper
    Mayer, Igor
    Meijer, Sebastiaan
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Trafik och logistik.
    Lessons learned from a decade of geme development for higher education in Delft2012Ingår i: Simulations, Games and Role Play in University Education / [ed] Nygaard, C., Courtney N., & Leigh, E., Libri Publishing , 2012, 1, s. 171-188Kapitel i bok, del av antologi (Refereegranskat)
  • 452.
    Wärnhjelm, Michael
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Trafik och logistik.
    Cykelolyckor i korsningar: Hur kan trafiksäkerheten förbättras?2013Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Stockholm city has recently raised its ambitions for bicycle traffic, the goal is to achieve a larger and

    safer bicycle traffic. But cyclists are more vulnerable on the roads than other vehicle users because of the lack of protection. This means that a large proportion of road safety for cyclists is based on the design of the traffic environment. Since most serious bicycle accidents are those that occur in conflict with motor vehicles, and the majority of these accidents occur at intersections, these areas are of great importance for

    cyclist’s safety.

    The  purpose  of  this  paper  is  to  highlight  bicycle  accidents  at  intersections  and  to  suggest improvements  in three accident-prone junctions  in Stockholm.  This is  achieved  by  the study of accident statistics, literature and finally three case studies.

    The literature study focused on cyclists, traffic safety and traffic safety measures. By describing the specific conditions and problems of cyclists a better picture of how this mode of transportation best work in traffic is provided. The factors that are important to consider, when road safety efforts are made, are then described. The literature studies are completed by describing specific examples of safety measures.

    The database STRADA is used to identify three intersections with the highest number of bicycle accidents in the past five years in Stockholm. These junctions were then studied, minor points at the intersections were selected for detailed observations using a simplified method of traffic conflict techniques. The observations during the case studies formed the basis for recommendations of the road safety measures in the intersections.

    A  very  rough  calculation was  done  on  the  anticipated  effects of  the  proposed  measures.  They showed  that  about  15  bicycle  accidents  of  a  total  of  29  could  be  avoided  with  the  proposed measures. Although the calculations are not exact, they show that there is a potential to increase road safety for cyclists in the studied intersections.

  • 453.
    Yang, Gang
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Trafik och logistik.
    Shared space for unregulated traveller interactions.2014Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Shared space is that “all street users move and interact in their use of space on the

    basis of informal social protocols and negotiations” (Hamilton-Baillie 2008). By

    minimizing demarcations, the dominance of motor vehicles reduces and it enables

    all users to share the space. As a result, drivers and cyclists have to reduce their

    speed, pedestrians watch more carefully to surroundings traffic. The purpose of

    shared space is to improve the road safety and build a pedestrian priority

    environment.

    But there are also concerns about the shared space safety. Since the roads are

    unregulated, they may become more dangerous to some pedestrians. The

    vulnerable pedestrians and designs have to be identified.

    This thesis explores the factors of shared space users and shared space itself to see if

    they will be potential dangers to the traffic. The case study focuses on two shared

    spaces in Stockholm city involving both residential area and famous tour site.

    The result shows that factors like gender, age, and partners do have different effects

    on traffic safety issues in shared space zones. But some factors like vehicle type,

    vehicle speed are not shown much difference in shared space zones. The thesis study

    gives detailed conclusions of the factors that can affect the shared space safety and

    suggestions on a shared space should be designed.

  • 454.
    Zanuy, Carrillo
    et al.
    TUB.
    Boysen, Hans
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Trafik och logistik.
    Mašek, J
    UNIZA.
    Buda, M
    UNIZA.
    Janíček, F
    TVP.
    Karabin, J
    TVP.
    VEL Wagon: State of the art and concept drafting2011Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The present deliverable presents a general overview of the European rail freight system in terms of:

    Demand:

    Where the general characteristics and trends on freight transportation market are analysed, obtaining among other conclusions that more transport of processed high-valued goods with low density and higher space requirement is happening in contrast to transport of bulk cargo and heavy goods.

    Supply

    Where the freight railway system and its performance are analysed, being intermodal transportation and unit trains the business segments with major interest. The current wagon fleet characteristics together with their performance are discussed to produce guidelines for VEL-Wagon concepts, among which the multipurpose applications. 

    Infrastructure

    General overview of railway infrastructure characteristics paying especial attention to loading gauges and axle loads.

    Finally it presents rough concept definitions of VEL-Wagon based on partners evaluation.

  • 455.
    Zhang, Yujin
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Trafik och logistik.
    Linjenätsutredning i Täby kommun.2013Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The public transport network in Täby commune consists currently of two types of bus line of which

    both belong to the category of feeder lines. The first type terminates at Danderyds sjukhus and feeds

    to the subway whereas the second type terminates at Täby centrum and feeds to Roslagsbanan, a

    suburban narrow-gauge railway system in northern Stockholm. The trunk bus line that connects

    greater parts of the commune with Danderyd is the ring line 604 and goes both clockwise (604H) and

    counterclockwise (604V). The main negative aspect of this structure is the complicity in incorporating

    it timetable-wise with other bus lines that share the same route, such as through Enebyberg.

    The goal of this project is to investigate the possibilities of splitting ring line 604 and connecting the

    ends to two different bus routes that terminate at Täby centrum today. Apart from easing the

    coordination with other bus lines through Enebyberg, the extension also creates new direct

    connections from various areas in Täby to Danderyds sjukhus. The time perspective of this project is

    winter 2013, which means it is taken for granted that the overall demand and volumes of passengers

    will remain the same as today.

    The method applied will be creating a zero option and a series of different scenarios. The different

    scenarios will be compared regarding the total trip time, travel distance and transfer times. From the

    comparisons one of the scenarios will be chosen and schedules for the proposed network will be

    constructed. After constructing the timetables for the proposed network, line block calculation will

    be made to determine the amount of vehicles needed for the scenario. The aim of the latter part is

    to determine whether the chosen scenario will lead to a decrease in cost for the entrepreneur in

    terms of vehicle usage. Evaluation of the scenarios will be done with the help of VISUM, a modeling

    program at macro scale. The base network is from SLL Trafikförvaltningen from year 2010 with the

    associated OD-matrices. Construction of the timetables and line blocks will be done in Excel.

    Results from the scenario evaluations show that an extension of bus lines 612 and 615 to Danderyds

    sjukhus will improve all of the indicators used in this project. From the timetable and line block

    constructions it is shown that the proposal does not lead to an increase in vehicle usage. The biggest

    drawback of the proposal is the coordination between 611 and 612 through Enebyberg and

    Roslagsbanan

    ’s timetable. Given the current conditions, it is hard to coordinate 611 and 612 through

    Enebyberg and at the same time guarantee connections with Roslagsbanan at Hägernäs with the

    timetable offered today. Another downside is bus line 615, which has more line types than the

    optimum. The suggestion is to shift parts of 605’s resource to 615 in order to create

    rigid 30-minute

    traffic between Danderyds sjukhus and Arninge during bigger parts of the day.

    The overall result of the project is positive, but not all goals were met. The main reason for not

    meeting all the goals is because that the information required to draw the necessary conclusions are

    of the sensitive type that a company should and would keep secret. The general result of the project

    is nonetheless regarded as acceptable and definitely aids further investigations within the topic.

  • 456.
    Ólafsdóttír, Ásdís
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Trafik och logistik.
    Bus service performance analysis.: Case study: Bus line 1 in Stockholm, Sweden2012Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Transit reliability is one of the key factors in running a successful transit system from both

    passengers’ and operators’ perspective. To improve the reliability of a transit service a

    performance analysis is necessary. There are several service measures that can be applied to

    evaluate the performance of a transit service, both in relation to service punctuality and

    service regularity. Punctuality can be considered of higher importance on low frequency

    lines and regularity on high frequency lines. Bunching is used to describe how vehicles

    occupying the same bus route tend to bunch up and consequently the reliability decreases.

    For improving reliability several holding control strategies can be applied such as schedulebased

    holding, where early vehicles are held at time points, and headway

    ‐based holding,

    where vehicles are held to retrieve even headways between consecutive vehicles.

    This thesis provides an overview of several different performance measures that can

    be analyzed using

    Automatic Vehicle Location data (AVL) and Automatic Passenger Counters

    data (APC) collected from bus vehicles. As a case study, bus line 1 in Stockholm was

    analyzed. The line is a high frequency, inner city bus line, where schedule based holding is

    the current holding control strategy.

    The performance analysis included an analysis of service regularity, service

    punctuality, dwell times, passenger boarding/alighting and load, and run times. A linear

    regression analysis was applied to evaluate the effects of passenger activity on the dwell

    times.

    The results showed that the overall service performance decreased along the line for

    both directions. Vehicle trajectories revealed increased bunching along the line. The drivers’

    compliance to holding analysis showed that there was room for improvement. Overall, the

    analysis showed that the current holding control strategy does not retrieve headway

    regularity and that the schedule for vehicle run times was too tight and needs revision.

    Furthermore, switching to headway

    ‐based holding was suggested.

  • 457.
    Östlund, Stefan
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Elektriska maskiner och effektelektronik (stängd 20110930).
    Andersson, Evert
    KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, Järnvägsteknik.
    Kottenhoff, Karl
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Trafik och logistik.
    Efficient Passenger Trains for the Future1999Ingår i: Proceedings of the WCRR99, 1999Konferensbidrag (Refereegranskat)
78910 451 - 457 av 457
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