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Mixed Operation with Express Train for Urban Railways in Seoul Metropolitan Area  

Son, Gi-Min (서울시정개발연구원)
Publication Information
Journal of Korean Society of Transportation / v.25, no.5, 2007 , pp. 195-207 More about this Journal
Abstract
The urban railways connecting between the inner city and suburb of Seoul metropolitan area, has lost the competitiveness against cars because too many stops deteriorated operating speed and passenger's level of service. This paper suggests that an express train should be introduced into the urban railway system in order to sort out such a complication. There are two considerations in the present study. Firstly, train schedule problem should be taken into account. In this regard, a new model for urban railway system was developed by revising the existing models dealing with single line freight railway. Approximate branch and bound algorithm based on conflict group rather than a single conflict was adopted. Consequently, it was found that the time saving in calculating the optimal schedule is the most meaningful contribution of the algorithm. The second consideration is associated with the application of the model. A case study was carried out using the actual operation data from Ansan line. In conclusion, the operation speed of the line can increase considerably with minimal number of new sidings.
Keywords
Railway Operation; Branch & Bound; TPS; Railway Schedule; Siding;
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