Related Experiment Video
Updated: May 5, 2026
11:41
Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
Published on: February 1, 2020
18.1K
Vulnerability analysis and passenger source prediction in urban rail transit networks
Junjie Wang1, Yishuai Li, Jingyu Liu
1School of Traffic and Transportation Engineering, Central South University, Changsha, Hunan, P.R. China.
Plos One
|November 22, 2013
Summary
Identifying critical urban rail transit (URT) segments is crucial for minimizing service disruptions. This study reveals a few highly vulnerable URT segments whose failure could significantly impact urban mobility, necessitating careful evaluation.
Area of Science:
- Urban planning
- Transportation engineering
- Network analysis
Background:
- Urban rail transit (URT) systems are vital for city mobility.
- Understanding URT network vulnerability is essential for maintaining service continuity.
- Previous analyses often overlook the complexity of passenger flow and failure impact.
Purpose of the Study:
- To estimate morning peak urban rail transit origin-destination (OD) matrices using large-scale human mobility data.
- To identify the most vulnerable URT segments capable of causing significant service interruptions.
- To develop a method for evaluating URT segment vulnerability considering failure response difficulty.
Main Methods:
- Collected and analyzed large-scale human mobility data from San Francisco and Boston.
- Estimated morning peak URT OD matrices.
- Developed a bipartite URT usage network to model passenger demand and transit connections.
- Analyzed the spatial distribution of passenger origins and destinations for URT segments.
Main Results:
- Identified a small number of highly vulnerable URT segments in both studied networks.
- Demonstrated that a bipartite network approach reveals complex passenger travel patterns.
- Showcased that considering failure response difficulty provides a deeper understanding of URT vulnerability.
- Predicted potential passenger flow transfer to road networks in case of URT segment failures.
Conclusions:
- A few critical URT segments pose a disproportionately high risk to overall network functionality.
- The bipartite URT usage network offers a novel framework for assessing transit vulnerability.
- Failure impact assessment should incorporate the complexity of passenger demand and rerouting challenges.
- Findings support proactive strategies for enhancing the resilience of urban rail transit systems.
Related Concept Videos
01:24Bus Impedance Matrix
622
Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
622
01:18Steps in Outbreak Investigation
780
In the ever-evolving field of public health, statistical analysis serves as a cornerstone for understanding and managing disease outbreaks. By leveraging various statistical tools, health professionals can predict potential outbreaks, analyze ongoing situations, and devise effective responses to mitigate impact. For that to happen, there are a few possible stages of the analysis:
780
01:25Multimachine Stability
700
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
700
02:12Short-distance Transport of Resources
14.9K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
14.9K
01:41Social Traps
20.5K
Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned...
20.5K
01:21Power System Three-Phase Short Circuits
745
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
745