Adjustment and optimization of line plan for regional high-speed railway network
To meet the transportation development goals of efficiency,accessibility,and equity proposed by the regional integration strategy,methods for adjusting and optimizing high-speed railway line plans were in-vestigated.Based on the requirements of different passenger categories in the region,an integer programming model was proposed to adjust existing train stop plans and introduce additional operating trains.It aims to min-imize the adjustments of the existing line plan,total train stops,and changes in the direct service frequency for passenger origin-destination(OD)pairs,and adheres to constraints on train service,train hierarchy,and train adjustment.After linearizing the model,C# was used to call CPLEX to solve it.The case study results of the Yangtze River Delta region indicate that the optimized plan clarifies the train hierarchy,and establishes a func-tional division of labor and coordination.The express service frequency for high-level OD pairs and the service frequency for commuter OD pairs are improved,and the average train travel speed is increased after implemen-ting the timetable.The direct rate of OD pairs in the region is increased by 6.5％.The service frequency and time distribution for low-level OD pairs are improved.Reasonable adjustments to the line plan are helpful for better utilizing the regional high-speed rail network to serve passengers.
万方数据
维普
