In this paper we analyze certain matching problems that arise in ground delay program planning. Ground delay programs are air traffic flow management initiatives put in place when airport arrival demand is expected to exceed arrival capacity for an extended length of time, e.g. 4 hours. Most of...

Train scheduling is a critical activity in rail traffic management, both off-line (timetabling) and on-line (dispatching). Time-Indexed formulations for scheduling problems are stronger than other classical formulations, like Big-M. Unfortunately, their size grows usually very large with the...