TY - GEN A1 - Harrod, Steven A1 - Schlechte, Thomas T1 - A Direct Comparison of Physical Block Occupancy Versus Timed Block Occupancy in Train Timetabling Formulations N2 - Two fundamental mathematical formulations for railway timetabling are compared on a common set of sample problems, representing both multiple track high density services in Europe and single track bidirectional operations in North America. One formulation, ACP, enforces against conflicts by constraining time intervals between trains, while the other formulation, HGF, monitors physical occupation of controlled track segments. The results demonstrate that both ACP and HGF return comparable solutions in the aggregate, with some significant differences in select instances, and a pattern of significant differences in performance and constraint enforcement overall. T3 - ZIB-Report - 13-18 KW - Railway Scheduling KW - Train Timetabling KW - Track Allocation Y1 - 2013 UR - https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/1794 UR - https://nbn-resolving.org/urn:nbn:de:0297-zib-17946 SN - 1438-0064 ER -