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Pedestrian dynamics models the walking movement of individuals in a crowd. Ithas recently been used in the analysis of procedures to reduce the risk ofdisease spread in airplanes, relying on the SPED model. This is a social forcemodel inspired by molecular dynamics; pedestrians are treated as pointparticles, and their trajectories are determined in a simulation. A parametersweep is performed to address uncertainties in human behavior, which requires alarge number of simulations.  The SPED model's slow speed is a bottleneck to performing a large parametersweep. This is a severe impediment to delivering real-time results, which areoften required in the course of decision meetings, especially duringemergencies. We propose a new model, called CALM, to remove this limitation. Itis designed to simulate a crowd's movement in constrained linear passageways,such as inside an aircraft. We show that CALM yields realistic results whileimproving performance by two orders of magnitude over the SPED model.

Constrained Linear Movement Model (CALM): Simulation of passenger movement in airplanes