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Nedir 30 IV. HI-SIM’s simulation tool can carry out detailed single train type simulations, multiple train rail network simulations for operational evaluation as well as traction power simulation. We can perform these simulations not only for basic train performance evaluation, but also for the analysis of operational requirements by considering the traction power system. As transit agencies and rail networks with electric train operations strive to reduce consumption and peak demand, we can model the best energy-saving strategies. Our simulations can include coasting, reduced tractive effort, voltage dependent current limits, deployment of regenerative braking – all of which can make rail mode greener. Our capabilities in operation simulation include feasibility studies, service/operation plan development, trip time predictions, network simulation/capacity analysis, fleet requirements analysis, cost-benefit studies, energy saving (“green”) speed profiles determination, evaluation of different alignment and/or train alternatives, and conceptual design development. We use a simulation tool, Hi-SimuX, which offers unique capabilities in integrated train performance/operation, traction power system, and signaling system analysis. Simulations can be carried out for a single train as well as for multi-track and multi-train situations. These simulations can be done only for basic train performance or in combination with the traction power systems. …