Evaluation model for straddle carrier operation system in Marine container terminal

This paper presents a petri net model for examining effectiveness of straddle carrier directsystem operation. A schematic process of straddle carrier operation is given by formalization of operation type and its motion sequences. An interchange model is proposed to represent transloading process that controls the flow of containers between container handling equipment. Simulation platform was developed to examine the deployment scenarios, which is related to the number of operating gantry cranes, straddle carriers and truck slots at transfer point. The simulation results suggest the tradeoff between operational efficiency and service quality by deployment combinations of cargo handling equipment which is valuable for decision support in terminal management system aiming for operation efficiency.