Empty vehicles management as a method for reducing passenger waiting time in Personal Rapid Transit networks

Daszczuk, Wiktor B.; Choromański, W.; Mieścicki, Jerzy; Grabski, Waldemar

doi:10.1049/iet-its.2013.0084

Cited by 25 publications

(23 citation statements)

References 8 publications

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“…The traffic in the case of light rail was analyzed analytically, but it is impossible to make such calculations for PRT network. Therefore, the analysis has been completed using simulations in Feniks 4.0 environment [12,13,19]. The simulator was prepared under Eco-Mobility project, among several simulation-based analyses of PRT [12,13,[20][21][22].…”

Section: Traffic Simulation Of Prt Systemmentioning

confidence: 99%

“…In the next experiment, the input rate was increased twice (column 2 in Table 3, extreme conditions for the network). Now, the safety margin is only 1.35 (grey background; recommended at least 2 [12,13]). Indeed, the network works poorly, as the increase of input rate causes average queue length to rise four times (from 0.15 to 0.60, grey background).…”

Section: Traffic Simulation Of Prt Systemmentioning

confidence: 99%

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A Study on Cooperation of Urban Transport Means: PRT and Light Rail

Grabski

Daszczuk

2018

Transport Problems

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It is difficult to organize urban transport in the city center. Existing buildings, narrow streets and working infrastructure make it difficult to use the oldfashion transport means such as trams or buses. The new idea consists in elevation of the transport in the very city above ground level (typical PRT systems cover rare areas like airport or fairgrounds). The study analyzes the hierarchical, layered system consisting of a ring light rail and PRT (Personal Rapid Transit) serving as commuter network. It is shown in the case of an exemplary city that the proposed solution is possible and reasonable. Ridership and vehicle mileage of the entire system are calculated for the light rail analytically, and in the case PRT by simulation.

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Section: Traffic Simulation Of Prt Systemmentioning

confidence: 99%

Section: Traffic Simulation Of Prt Systemmentioning

confidence: 99%

A Study on Cooperation of Urban Transport Means: PRT and Light Rail

Grabski

Daszczuk

2018

Transport Problems

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“…The problem of dynamically managing empty vehicles within the PRT can be tackled as a dynamic routing and scheduling problem. Nevertheless, only few studies concerning empty vehicles management in PRT have been published [7,8].…”

Section: 2mentioning

confidence: 99%

“…Several studies related to PRT have focused on the feasibility and design of such a system [3][4][5][6] and, until recently, had sought to tackle operating issues in PRT, such as waiting times for passengers [7,8], dynamic routing [9][10][11], agentbased simulation [12], network design [13], fleet sizing [14], and energy consumption in both static [15][16][17][18] and dynamic context [19]. For more details on the PRT literature, the reader is referred to [1,20].…”

Section: Introductionmentioning

confidence: 99%

Dealing with the Empty Vehicle Movements in Personal Rapid Transit System with Batteries Constraints in a Dynamic Context

Fatnassi

Chebbi

Chaouachi

2017

Journal of Advanced Transportation

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The Personal Rapid Transit is a new emergent transportation tool. It relies on using a set of small driverless electric vehicles to transport people on demand. Because of the specific on-demand characteristic of the Personal Rapid Transit system, many Personal Rapid Transit vehicles would move empty which results in a high level of wasted transportation capacity. This is enhanced while using Personal Rapid Transit vehicles with limited electric battery capacity. This paper deals with this problem in a real time context while minimizing the set of empty vehicle movements. First, a mathematical formulation to benchmark waiting time of passengers in Personal Rapid Transit systems is proposed. Then, a simulation model that captures the main features of the Personal Rapid Transit system is developed. A decision support system which integrates several real time solution strategies as well as a simulation module is proposed. Our dispatching strategies are evaluated and compared based on our simulation model. The efficiency of our method is tested through extensive test studies.

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“…The function of doorto-door movement with a larger number of vehicles running on the network requires application of traffic control algorithm solutions. In order to design traffic control algorithm, the methods of mobile phones and event simulators were considered Mieścicki, Daszczuk 2013;Daszczuk et al 2015). The results of design work were published (Choromański, Kowara 2013a.…”

Section: Introductionmentioning

confidence: 99%

Simulation method for determining traction power of ATN–PRT vehicle

Kozłowski

2016

Transport

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Abstract. The construction of Personal Rapid Transit (PRT) vehicle made within the framework of Eco-Mobility project has been described in the present paper. Key features of the vehicles were identified -e.g. drive with three-phase linear motor with winding on the vehicle and fixed rotor in the road surface, contactless dynamic vehicle powering. Attention was paid to the difference in dynamic properties compared to rail vehicles, related to the lack of the so-called 'centering mechanism' . A development of a nominal model for the analysis of vehicle drive properties was presented.Results of simulation studies were presented for a vehicle with running-drive system construction, planned for implementation in the city of Rzeszów (Poland). While discussing the problems of building a PRT system, there was a focus on the issue of determining power and traction of the vehicle. A methodology for determining the power and traction energy consumption of the vehicle was presented for assumed conditions of travel on road segments. Input values for the calculation of power are variables describing the curvature (or bends radii) of paths of movement between stops and the course of the current speed. Output values are total traction power or traction energy (where 'traction' refers to the power or mechanical work of drive forces). Three basic elements of traction power were isolated: the power of kinetic energy (for acceleration/delay of vehicle movement) basic (to offset the aerodynamic force of motion resistance at constant speed) and additional losses (to offset additional motion resistance forces operating in turns at constant speed). Due to the lack of vehicle prototypes with assumed structure, it was proposed that these components are determined via simulation. The presented results relate to the calculation of demand for power and energy for the planned test section. The scope of further work was indicated: determining the required traction characteristics of electric drive, selecting the best values for supercapacitor's capacity in the drive system, determining the technical parameters of substation.

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Empty vehicles management as a method for reducing passenger waiting time in Personal Rapid Transit networks

Cited by 25 publications

References 8 publications

A Study on Cooperation of Urban Transport Means: PRT and Light Rail

A Study on Cooperation of Urban Transport Means: PRT and Light Rail

Dealing with the Empty Vehicle Movements in Personal Rapid Transit System with Batteries Constraints in a Dynamic Context

Simulation method for determining traction power of ATN–PRT vehicle

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