• Title, Summary, Keyword: personal rapid transit

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Status and Potential of Personal Rapid Transit (소형궤도열차의 현황 및 가능성)

  • Jeong R.G.;Cho H.S.;Kim Y.S.;Chung S.G.;Lee A.H.
    • Proceedings of the KSR Conference
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    • pp.232-238
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    • 2003
  • This paper carry out research on status of the development for personal rapid transit in world's classified by each system. review of potential development a thesis of system conception according to system in comparison with developed specification and element a technology review, local area, capacity etc. will propose a new scheme for a confirmed technology of personal rapid transit

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A Study on the Headway of the Personal Rapid Transit System (개인고속이동(Personal Rapid Transit) 시스템의 운전시격에 대한 연구)

  • Shin Ducko;Kim Yong-Kyu;Lee Jun-Ho
    • Journal of the Korean Society for Railway
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    • v.8 no.6
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    • pp.586-591
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    • 2005
  • We deal with the headway which effects on the performance of the PRT(Personal Rapid Transit) system and the system safety. The headway, time between passage of one vehicle and the next, is one of the important factors to assess the line capacity, which has a cue to solve the problem of the congestion in public transportation. To decide the headway there are many important factors, especially such as the failure vehicle deceleration rate, the following simple analytical equation can be made to assess the relation between the line speed and the minimum headway. In this paper we employ a numerical analysis method using a simple analytical equations for the evaluation of the minimum headway and show simple simulation results.

A Dispatching and Routing Algorithm for Personal Rapid Transit by Considering Congestion (정체를 고려한 Personal Rapid Transit 배차 및 경로 계획 알고리즘)

  • Han, Chung-Kyun;Kim, Baek-Hyun;Jeong, Rag-Gyo;Ha, Byung-Hyun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.11
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    • pp.1578-1586
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    • 2015
  • Personal rapid transit (PRT) is getting attention as a new form of transportation. It is energy efficient and provides the high level of passenger service. In this study, the dynamic PRT dispatching and routing problem is dealt with. Passengers request transportation service on a complex network, and an operating system monitors passenger arrivals and coordinates vehicles in real time. A new online dispatching and routing algorithm is proposed, which minimizes the total travel distance of vehicles and the waiting time of passengers. The algorithm dispatches vehicles by considering multiple vehicles' state and multiple passengers at the same time. In particular, finding the shortest-time path is attempted by taking into account the future congestion on lanes. Discrete-event simulation is employed to validate the performance of the proposed algorithm. The results show the algorithm in this study outperforms others.

Diversion Rate Estimation Model for Unexperienced Transportation Mode by Considering Maximum Willingness-to-pay: A Case Study of Personal Rapid Transit (최대 지불의사액을 고려한 미경험 교통수단의 전환율 추정모형: Personal Rapid Transit 사례를 중심으로)

  • Yu, Jeong Whon;Choi, Jung Yoon
    • Journal of Korean Society of Transportation
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    • v.31 no.3
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    • pp.33-44
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    • 2013
  • Personal Rapid Transit(PRT) has emerged as a promising transportation mode for transit-oriented sustainable communities. In this study, an alternative design of questionnaire survey is proposed in order to capture traveler's perception of an unexperienced transportation mode. This study aims at predicting the mode choice diversion behavior of potential PRT users who do not have experience of using it previously, considering their willingness-to-pay. The proposed model was applied to predict an aggregate forecast of PRT patronage for the city of Songdo where PRT is considered to be constructed. For validation of the proposed model, the price elasticity of PRT demand was analyzed, compared with existing models. The analysis results suggest that the proposed design of questionnaire survey is able to capture respondents' attitude and perception to unexperienced transportation mode in an effective manner. Also, they show that the proposed diversion rate model is more realistic than existing models in explaining the effects of users' willingness-to-pay for predicting PRT patronage.

An Online Personal Rapid Transit Dispatching Algorithm Based on Nearest Neighbor Dispatching Rule (최근린 배차 규칙 기반 온라인 Personal Rapid Transit 배차 알고리즘)

  • Han, Chung-Kyun;Kwon, Bo Bea;Kim, Baek-Hyun;Jeong, Rag-Gyo;Lee, Hoon;Ha, Byung-Hyun
    • Journal of the Korea Society for Simulation
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    • v.23 no.4
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    • pp.97-109
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    • 2014
  • Personal rapid transit (PRT) is a new transportation system, which is energy efficient and brings high quality of customer service. Customers arrive dynamically at stations and request transportation service. In this paper, we propose a new online PRT dispatching algorithm for pickup and delivery of customers. We adopt the nearest neighbor dispatching rule, which is known as performing well in general. We extend the rule with bipartite matching in order to deal with multiple vehicles and customers at the same time. We suggest a systematic way for selecting vehicles that will be considered to be dispatched, since the scope with which vehicles are selected may affect the system performance. We regard the empty travel distance of vehicles and the customer waiting time as the performance measures. By using simulation experiments, it has been examined that the scope of dispatching affects the system performance. The proposed algorithm has been validated by comparing with other dispatching rules for transportation services. We have shown that our algorithm is more suitable for PRT operating environment than other dispatching rules.

A Configuration of the Apparatus for the Development of the Collision Avoidance Algorithm of Personal Rapid Transit (소형궤도 차량의 충돌회피 알고리즘 개발을 위한 장치 구성)

  • Lee, Jun-Ho;Shi, Kyong-Ho
    • Journal of the Korean Society for Railway
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    • v.10 no.3
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    • pp.337-342
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    • 2007
  • 소형궤도 차량 시스템(PRT: Personal Rapid Transit)은 짧은 거리에 비교적 많은 승객을 수송하기 위하여 매우 짧은 차간 간격을 요구하며 또한 차량 간의 충돌을 피하기 위해서 매우 정확한 차량 속도제어 알고리즘을 필요로 한다. 본 논문에서는 소형궤도차량 시스템의 차량의 충돌회피 알고리즘 개발을 위한 장치의 구성에 대해서 다룬다. 개발 장치는 모의 차량, 중앙제어 시스템, 모의지상설비, 모니터링 장치로 구성되며, 설계된 알고리즘의 모의시험을 위해서 Labview Simulation Interface Toolkit과 Matlab/Simulink가 결합된 모의시험 환경을 이용한다.

Traffic Capacity Estimate of Personal Rapid Transit System based on Digraph Model (소형자동궤도차량 시스템의 그래프 모델 기반 수송능력 추정)

  • Won, Jin-Myung
    • Journal of Institute of Control, Robotics and Systems
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    • v.13 no.3
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    • pp.263-267
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    • 2007
  • This study proposes a new methodology to estimate the traffic capacity of a personal rapid transit(PRT) system. The proposed method comprises three steps. The first step models the guideway network(GN) of PRT as a digraph, where its node and link represent a station and a one-way guideway link between two stations, respectively. Given local vehicle control strategies, the second step formulates the local traffic capacities through the nodes and links of the GN model. The third step estimates the worst-case local traffic demands based on a shortest-path routing algorithm and an empty vehicle allocation algorithm. By comparing the traffic estimates to the local traffic capacities, we can determine the feasibility of the given GN in traffic capacity.

A Computer Simulator to Assess the Operational Scenarios for the Personal Rapid Transit Systems

  • Lee, Jun-Ho;Lee, Jae-Ho;Kim, Yong-Kyu
    • International Journal of Railway
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    • v.1 no.3
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    • pp.117-121
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    • 2008
  • The personal rapid transit (PRT) system is a small scale transportation system that employs a novel concept to solve the traffic congestion problem in the city area. The PRT system is a driverless on-demand system that a passenger calls a vehicle rather than waits for the vehicle. Therefore, one of the most important issues in the PRT system is how to control the vehicle with the satisfaction of the basic concept of the PRT system. In this paper a computer simulator is introduced to evaluate the vehicle. operational control algorithm of the PRT system. The. computer simulator has the commercial embedded processor boards that operate in the real time operating system and pre-designed vehicle control algorithm is coded into the processor boards. The experimental results present the effectiveness of the proposed evaluation apparatus.

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