This paper introduces Dr.METRO, which is a demand responsive metro-train operation planning program. It involves several key functions for metrotrain operation planning such as the data handling of passenger traffic, demand forecasting, train scheduling and the sequencing of a train-set operation.It uses mathematical optimization techniques to solve the train scheduling problems and heuristic algorithms for the sequencing of a train-set out of the train schedule. Besides the optimization technique-based algorithms, it fulfils several useful graphic user interface (GUI) functions that are designed to be user friendly.Dr.METRO is a software program developed to operate stand-alone with a compact and open structure. Its operating condition is IBM -a compatible PC and Windows framework. One of its merits is that a planner can use it separately from a formal business process in a company. So that he/she can prepare a train schedule according to his/her own creative concept and experience, not being restricted to organizational considerations. Dr.METRO helps them perform various quantitative analyses on schedule, sequence and monitor passenger traffic for better a train schedule and train-set sequence.
Many urban railways operate a single type normal train without combination with an express train on a line, particularly in Korea. As a result, the average speed of Korean urban trains becomes much slower than those of advanced railways. This paper is one result of Korean research into improving the low speed on urban railways. This paper presents two case studies of retrofitting urban railway infrastructure for a skip-stop operation; SMRT (Seoul Metropolitan Rapid Transit Co.) and KORAIL (Korea Railroad) lines. The first case takes an approach of minimum investment, and the second case tolerates the required investment for retrofitting infrastructure. Moreover, it presents several issues for retrofitting the existing infrastructure to make the line enable skip-stop operation. The first is to utilize existing staying sidings for overnight trains in the skip-stop operation. Second is skip-stop scheduling which consists of designing the stop-pattern of express trains and a trade-off between headway versus travel time. Last is a safety issue in the engineering work of an in-operating line and signalling system.
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