scholarly journals Slow Mobility, Greenways, and Landscape Regeneration. Reusing Milan’s Parco Sud Decommissioned Rail Line as a Landscape Cycle Path, 2019

2019 ◽  
pp. 149-158
Author(s):  
Raffaella Neri ◽  
Laura Anna Pezzetti
Keyword(s):  
Rail Line ◽  
Cycle Path

scholarly journals A Fuzzy Optimization Model for High-Speed Railway Timetable Rescheduling

2012 ◽  
Vol 2012 ◽  
pp. 1-22 ◽  
Author(s):  
Li Wang ◽  
Yong Qin ◽  
Jie Xu ◽  
Limin Jia
Keyword(s):  
Optimization Model ◽  
High Speed ◽  
Fuzzy Optimization ◽  
Soft Constraints ◽  
Accurate Approximation ◽  
Total Delay ◽  
High Speed Rail ◽  
High Speed Railway ◽  
Tolerance Approach ◽  
Rail Line

A fuzzy optimization model based on improved symmetric tolerance approach is introduced, which allows for rescheduling high-speed railway timetable under unexpected interferences. The model nests different parameters of the soft constraints with uncertainty margin to describe their importance to the optimization purpose and treats the objective in the same manner. Thus a new optimal instrument is expected to achieve a new timetable subject to little slack of constraints. The section between Nanjing and Shanghai, which is the busiest, of Beijing-Shanghai high-speed rail line in China is used as the simulated measurement. The fuzzy optimization model provides an accurate approximation on train running time and headway time, and hence the results suggest that the number of seriously impacted trains and total delay time can be reduced significantly subject to little cost and risk.

Environmental Vibration Analysis Induced by Subway Trains Running in Overlapping Shield Tunnels

2013 ◽  
Vol 671-674 ◽  
pp. 214-217
Author(s):  
Yuan Wen Liu ◽  
Xiao Feng Ren
Keyword(s):  
Rail Transport ◽  
Vibration Source ◽  
Rail Transportation ◽  
Empirical Formulas ◽  
Linear Superposition ◽  
Vibration Attenuation ◽  
Environmental Vibration ◽  
Rail Line ◽  
Subway Train ◽  
Further Development

Environmental vibration problem caused by rail transport is always a crucial problem for the development of rail transport harmoniously and favorably. Lots of legislations have formulated to constrain this problem in many countries, however, most of them are worked out based on the analysis results and measured data from only single rail line. With the further development of rail transportation in China, more and more engineering will cross the others inevitably, which will cause a more complicated problem with multi-vibration source. And obviously, the multi-vibration source problem is not the linear superposition of several single vibration source problems. Focusing on two being planned overlapping shield tunnels, the computation model is established and the environmental vibration is calculated and analyzed by considering the running mode and running number of subway train. Fitting analysis is conducted and empirical formulas for vibration attenuation and then, the vibration range is determined accordingly. The research results in the paper can provide guide for the pre-design of overlapping engineering and also can offer references for the completion of relative legislations.

scholarly journals Stop Plan of Express and Local Train for Regional Rail Transit Line

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Qin Luo ◽  
Yufei Hou ◽  
Wei Li ◽  
Xiongfei Zhang
Keyword(s):  
Energy Consumption ◽  
Travel Time ◽  
Programming Model ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Long Distance ◽  
Passenger Travel ◽  
Urban Rail ◽  
Proposed Model ◽  
Rail Line

The urban rail transit line operating in the express and local train mode can solve the problem of disequilibrium passenger flow and space and meet the rapid arrival demand of long-distance passengers. In this paper, the Logit model is used to analyze the behavior of passengers choosing trains by considering the sensitivity of travel time and travel distance. Then, based on the composition of passenger travel time, an integer programming model for train stop scheme, aimed at minimizing the total passenger travel time, is proposed. Finally, combined with a certain regional rail line in Shenzhen, the plan is solved by genetic algorithm and evaluated through the time benefit, carrying capacity, and energy consumption efficiency. The simulation result shows that although the capacity is reduced by 6 trains, the optimized travel time per person is 10.34 min, and the energy consumption is saved by about 16%, which proves that the proposed model is efficient and feasible.

scholarly journals Evaluasi Teknis Rencana Jalur Light Rail Transit (LRT) Di Wilayah Bandung Raya

2020 ◽  
Vol 2019 (1) ◽  
Author(s):  
Tessalonika Natalia Djie ◽  
Sumarno Sumarno
Keyword(s):  
Geometric Analysis ◽  
High Population ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Horizontal Curve ◽  
West Java ◽  
Rail Line ◽  
Technical Evaluation

ABSTRAKLight Rail Transit (LRT) kini menjadi salah satu sarana transportasi darat yang sedang direncanakan untuk memenuhi kebutuhan transportasi pada suatu kota yang memiliki tingkat kepadatan penduduk yang tinggi. Di wilayah Bandung Raya telah ada rencana jalur LRT yang disusun oleh Dinas Perhubungan Provinsi Jawa Barat yang terdiri atas delapan koridor. Pada penelitian ini dilakukan evaluasi teknis rencana jalur LRT khususnya pada koridor-1 (Leuwi Panjang–Jatinangor) dan koridor-4 (Leuwi Panjang– Babakan Siliwangi). Tujuan dari penelitian ini adalah mengevaluasi tingkat kesesuaiannya dengan persyaratan teknis jalur kereta api, khususnya terhadap aspek geometrik yaitu kelandaian dan kelengkungan. Evaluasi dilakukan dengan melakukan analisis geometrik pada rencana jalur LRT dengan persyaratan teknis jalur kereta api terhadap lima kelas jalan rel. Berdasarkan hasil analisis diketahui bahwa pada koridor-1 sudah memenuhi persyaratan kelandaian dan lengkung horizontal untuk semua kelas, sedangkan koridor-4 belum memenuhi persyaratan tersebut.Kata Kunci: Light Rail Transit (LRT), kelandaian, lengkung horizontalABSTRACTLight Rail Transit (LRT) now become one of transportation means to fullfil the need of transportation in one of regions which is having high population. In Bandung Raya region, there were plans of LRT line which is arranged by Dinas Perhubungan West Java Province which consist of eight coridors. This research has done the technical evaluation for planning the LRT especially on corridor-1 (Leuwi Panjang- Jatinangor) and corridor-4 (Leuwi Panjang-Babakan Siliwangi). The aim of this reasearch is to evaluate the appropriateness levels with the rules and regulations of train technical lines, especially on the aspec of geometric including slope and horizontal curve. The evaluation is done by doing geometric analysis in the plan of LRT line with rules and regulations of train technical line toward five classes of rail line. Based on the result of analysis, it can be revealed that corridor-1 has been fullfil the rules and regulations of slope and horizontal curve for every classes, while corridor-4 do not fullfil the rules and regulations yet.Keywords: Light Rail Transit (LRT), slope, horizontal curve

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