This project provides a tool for evaluating various guided vehicle systems. The tool is a discrete event simulation package which runs on entered parameters and simulates a variety of guided vehicle systems with different configurations. This provides a means of evaluating alternative system configurations and observing system performance for a particular set of restrictions. GVSim aids in testing and developing the feasibility of various concepts in the design of guided vehicle systems. Also, the user has the ability to drop down to the subroutine level and modify code in order to model the system using a different control logic. Hence the package provides some of the benefits of a simulator along with the ability to change the inherent assumptions within the package.