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The problem was modeled as a biobjective integer optimization problem from the perspective of the infrastructure manager. Two objective functions were minimized: (a) the total costs of planned maintenance and renewal actions and (b) the total number of train delays caused by speed restrictions. A small example for a simple network was analyzed in which the optimal Pareto frontier was found through a simulated annealing technique.<\/jats:p>","DOI":"10.3141\/2261-19","type":"journal-article","created":{"date-parts":[[2012,3,5]],"date-time":"2012-03-05T09:48:28Z","timestamp":1330940908000},"page":"163-170","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":51,"title":["Biobjective Optimization Model for Maintenance and Renewal Decisions Related to Rail Track Geometry"],"prefix":"10.1177","volume":"2261","author":[{"given":"A. 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