Robust rollingstockinrapidtransitnetworks

This paperfocusesontherailwayrollingstockcirculationprobleminrapidtransitnetworks,inwhich frequenciesarehighanddistancesarerelativelyshort.Althoughthedistancesarenotverylarge,service times arehighduetothelargenumberofintermediatestopsrequiredtoallowproperpassengerflow.The main complicatingissueisthefactthattheavailablecapacityatdepotstationsisverylow,andboth capacityandrollingstockaresharedbetweendifferenttrainlines.Thisforcestheintroductionofempty train movementsandrotationmaneuvers,toensuresufficientstationcapacityandrollingstock availability. However,theseshuntingoperationsmaysometimesbedifficulttoperformandcaneasily malfunction,causinglocalizedincidentsthatcouldpropagatethroughouttheentirenetworkdueto cascadingeffects.Thistypeofoperationwillbepenalizedwiththegoalofselectivelyavoidingthemand amelioratingtheirhighmalfunctionprobabilities.Critictrains,definedastrainservicesthatcome throughstationsthathavealargenumberofpassengersarrivingattheplatformduringrushhours,are also introduced. We illustrateourmodelusingcomputationalexperimentsdrawnfromRENFE(themainSpanish operatorofsuburbanpassengertrains)inMadrid,Spain.Theresultsofthemodel,achievedin approximately1min,havebeenreceivedpositivelybyRENFEplanners.