Algorithmic Methods for Railway Optimization [electronic resource] : International Dagstuhl Workshop, Dagstuhl Castle, Germany, June 20-25, 2004, 4th International Workshop, ATMOS 2004, Bergen, Norway, September 16-17, 2004, Revised Selected Papers / edited by Frank Geraets, Leo Kroon, Anita Schoebel, Dorothea Wagner, Christos D. Zaroliagis.