@techreport{GroetschelKrumkeRambau2001, author = {Martin Gr{\"o}tschel and Sven Krumke and J{\"o}rg Rambau}, title = {Online Optimization of Complex Transportation Systems}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {01-17}, language = {eng}, year = {2001} }