h i g h l i g h t s• A method to evaluate public transport network vulnerability.• Using a non-equilibrium dynamic transit operations model. • Modelling and quantifying temporal and spatial spillover effects of disruptions.• Effects on network saturation and network recovery time are evaluated. • The method is applied to the case of Stockholm rapid public transport system. a b s t r a c tWe propose a method to evaluate public transport network vulnerability. We study the evolution of the passenger Volume Over Capacity (VOC) ratio throughout the network to measure the spatial and temporal extent of the impacts caused by an unplanned service segment disruption. The VOC ratio provides an indication of the on-board travel comfort, an important level-of-service indicator, as well as reflects the residual capacity for absorbing additional demand. Because of the dynamic nature of public transport systems, disturbances propagate through the network in both time and space. Our modelling approach is able to capture transit system dynamics and quantify the extent to which the network exhibits spillover effects. We apply the method to the case of the rapid public transport system of Stockholm Sweden We demonstrate how the changes in network saturation and the corresponding recovery time can be quantified.

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