scholarly journals Causal evaluation of the health effects of light rail line: A natural experiment

2022 ◽  
Vol 24 ◽  
pp. 101292
Author(s):  
Behram Wali ◽  
Lawrence D. Frank ◽  
Deborah R. Young ◽  
Richard T. Meenan ◽  
Brian E. Saelens ◽  
...  
Keyword(s):  
Health Effects ◽  
Natural Experiment ◽  
Light Rail ◽  
Rail Line

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

scholarly journals Is natural experiment a cure? Re-examining the long-term health effects of China's 1959–1961 famine

2016 ◽  
Vol 148 ◽  
pp. 110-122 ◽  
Author(s):  
Hongwei Xu ◽  
Lydia Li ◽  
Zhenmei Zhang ◽  
Jinyu Liu
Keyword(s):  
Health Effects ◽  
Natural Experiment

Transit Signal Priority Along Arterials Using Advanced Detection

2003 ◽  
Vol 1856 (1) ◽  
pp. 220-230 ◽  
Author(s):  
Yann Wadjas ◽  
Peter G. Furth
Keyword(s):  
Control Strategies ◽  
Traffic Density ◽  
Light Rail ◽  
Transit Signal Priority ◽  
Adaptation Algorithm ◽  
Peer Communication ◽  
Length Estimation ◽  
Rail Line ◽  
Peak Travel ◽  
Green Period

This research developed and tested the concept of advanced detection and cycle length adaptation as a strategy for providing priority for transit vehicles. In a departure from control strategies that rely on detection only a few seconds in advance of the stopline, a control algorithm was developed in which transit vehicles are detected two to three cycles in advance of their arrival at an intersection stopline, and phase lengths were then constrained so that the transit-serving phase was green for a 40-s predicted arrival window. Methods were developed for selecting whether to extend or compress phase lengths to shift a green period to cover the arrival window. Adaptive control was combined with actuated control using traffic density and queue length estimation, transit stopline actuation, and peer-to-peer communication for coordination in the peak travel direction. The method was applied by simulation to Boston, Massachusetts’ Huntington Avenue corridor, which is served by a light-rail line running partly in mixed traffic and partly in a median reservation. The prediction/adaptation algorithm resulted in 82% of the trains arriving during the green phase. This control strategy resulted in substantial improvements to transit travel time and regularity with negligible impacts on private traffic and pedestrians, and was found to be more effective than simple preemption.

Simulation-Based Comparison of Holding Strategies for a Multibranch Light Rail Service

2017 ◽  
Vol 2648 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Joshua J. Fabian ◽  
Gabriel E. Sánchez-Martínez
Keyword(s):  
Control Point ◽  
Light Rail ◽  
Massachusetts Bay ◽  
Real Time Control ◽  
Time Control ◽  
Special Events ◽  
Simulation Based ◽  
Transit Services ◽  
Rail Line ◽  
Demand Variability

Light rail transit services face many operational challenges, such as capacity constraints, mixed-traffic interference, and branch junctions. The service plans developed for these lines typically specify a precise schedule for each vehicle. Running time and demand variability, special events, and incidents make it challenging to adhere to schedules. Operators can enact real-time control actions to mitigate delays. This research compared the effectiveness of schedule- and headway-based holding strategies applied en route and at terminals (i.e., dispatching) on a simulation model of the Massachusetts Bay Transportation Authority Green Line, a four-branch light rail line. The effects of control point placement at terminals, along branches, along a central trunk, and in combinations of these three were studied, as were the effects of limiting holding at midroute stations. Holding strategies were compared on the basis of service and passenger-oriented performance. Headway-based holding was found to be a more effective method for ensuring that passengers experienced reasonable wait times within scheduled headways. Holding at terminals appeared to be the most beneficial to passengers; additional holding along the branches and limited holding along the trunk were shown to enhance these benefits. Holding only within the trunk of a multibranch service worsened service because of blockages from held trains.

scholarly journals Construction of a Light Rail line to Wilanów

2016 ◽  
Vol 2016 (7) ◽  
pp. 9-16
Author(s):  
Grzegorz Madrjas
Keyword(s):  
Feasibility Studies ◽  
Light Rail ◽  
Historical Aspects ◽  
Main Design ◽  
Rail Line ◽  
Design Ideas ◽  
Design Challenges

The paper describes main design ideas for a project of a tramway connection between districts of Warsaw: Wola, Ochota, Mokotów and Wilanów. Historical aspects, main spatial documents as well as feasibility studies are also discussed. Moreover, key design challenges are presented which concern routing options and limitations of passing through special locations.

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