Bus departure schedule is one of the most complex and important issues in bus planning. The existing bus schedule is designed for a single bus route one by one. Although it is more convenient to implement, it does not take into account the connection between routes. This paper proposes a multi-objective model for collaborative design of bus network timetable, which can maximize the transfer efficiency of passengers and take into account the operating benefits of bus companies on the premise of changing the minimum scope of the original bus schedule. Based on the transport capacity of vehicles, the model inserts the relaxation time into the original timetable, aiming at the maximum transfer efficiency within the transfer time window and the minimum relaxation time, so that different lines can coordinate to reach the transfer station and achieve the purpose of passengers' flexible transfer. According to the characteristics of the model, a genetic algorithm with elite strategy based on non-dominant ranking is designed, and the optimized schedule is obtained.

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