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Development of Auto-calibration System for Micro-Simulation Model using Aggregated Data (Case Study of Urban Express)  

Lee, Ho-Sang (서울시립대학교)
Lee, Tae-Gyeong (한양대학교)
Ma, Guk-Jun (서울시청 교통운영과)
Kim, Yeong-Chan (서울시립대학교 교통공학과)
Won, Je-Mu (한양대학교 도시대학원)
Publication Information
Journal of Korean Society of Transportation / v.29, no.1, 2011 , pp. 113-123 More about this Journal
Abstract
The application of micro-simulation model has been extended farther with improvement of computer performance and development of complicated model. To make a micro-simulation model accurately replicate field traffic conditions, model calibration is very crucial. Studies on calibration of micro-simulation model have not been enough while lots of studies on calibration of macro-simulation model have been continued in our country. This paper presents an auto-calibration of parameter values in micro-simulation model(VISSIM) using genetic algorithm. RMSE(Root Mean Square Error) of collected volume on the urban expressway versus simulated volume is set as MOP(measure of performance) and objective function of optimization is set as to minimize the RMSE. Applying to urban expressway(Nae-bu circular) as a case study, it shows that RMSE of optimized parameter values decrease 60.4%($19.3{\longrightarrow}7.6$) compared to default parameter values and the proposed auto-calibration system is very effective.
Keywords
Micro-simulation model; Calibration; VISSIM; Genetic algorithm; Urban expressway;
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