Development of the Operational Stability and Efficiency Evaluation Model for Metro Systems
Date Issued
2012
Date
2012
Author(s)
Ip, Chi-Sang
Abstract
A successful metro operation is a balance mix of operational stability and efficiency. Due to the potential system disruptions, metro operation should incorporate an appropriate level of slack in order to efficiently recover the system to normal state. Insufficient slacks results in unacceptable operational stability while surplus slacks incur unnecessary expense and waste. Consequently, there exists a trade-off relationship between operational stability and efficiency, of which the evaluation is an extremely important topic for metro operation. In this study, an analytical model is developed based on capacity analysis concept to assess the stability and efficiency of metro operation by “expected recovery time” and “capacity utilization” respectively. The point estimate method (PEM) is also introduced to quantify the uncertainty of operational stability arising from the randomness of system disruptions. Empirical results show that the developed tool not only can evaluate the operational stability and efficiency of the metro system but also identify critical sections and time slots the operators should look into with the associated uncertainty. This evaluation process provides metro operators with a quick look on their operational strategies regarding stability and efficiency, helps them provide reliable and robust services to their customers, and return on shareholder’s investment.
Subjects
Operational stability
Capacity Utilization
Capacity Analysis
Expected Recovery time
Point Estimate Method
SDGs
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-101-R99521528-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):f14a6a144bedf2aeb7caa8839a474a2b