Optimal Speed and Technical OPtiions for Speed-up on lntercity Railway Network

本研究提出了“日本城际铁路提速模型”，该模型可以根据社会效益、铁路运营商利润和改进成本计算出各条线路的平均速度，该模型由运输市场子模型、技术速度子模型、技术成本子模型和速度效益子模型四个子模型组成。在运输市场子模型中，建立了既能模拟运输方式选择又能模拟运输路径选择的铁路客流预测模型。在技术速度子模型中，我们提出了一个表达式，可以输出给定技术选项的平均速度。当给出技术选项时，技术成本子模型输出改进成本。速度-效益子模型可以计算给定速度下的用户效益和运营商效益，最后在给定OD流量、各方式（铁路、公路交通和航空）服务水平和各线路技术方案的情况下，通过整个模型确定平均速度。这里的技术方案包括车辆技术和基础设施技术，其水平由运营商选择。通过将模型应用于日本现有网络和2000年网络，我们模拟了两种情况下的速度水平和技术方案：一个是铁路运营商利润最大化，另一个是用户净收益最大化，仿真结果表明，我们展示了两种情况下的最佳速度和技术选择。

This study provides the "Speedup Model on Intercity Railway in Japan", which can calculate the average velocity on each railway line, based on social benefit, railway operator's profit and improvement cost.The model consists of four sub- models, that is, Transport Market sub-model, Technology-Velocity-sub-model, Technology-Cost sub-model, and Velocity-Benefit sub-model. In the Transport Market sub-model, we constructed a railway flow estimating model that can simulate both model choice and route choice. In the Technology-Velocity sub-model, we proposed an expression that can output the average velocity from a given technical option. The Technology-Cost sub-model outputs an improvement cost when a technical option is given. The Velocity-Benefit sub-model can calculate the user's benefit and the operator's profit under the given velocity.Finally, the average velocity is determined through the whole model when OD flow, service level of all modes (railway, road traffic and air), and technical option of each line are given. Here, the technical option consist of vehicle's technique and infrastructure's technique whose level is selected by the rallway operator.By applyint the model to the present network and the 2000-year network in Japan, we simulate the velocity level and the technical options in two cases : one is maximisation of railway operator's profit, and the other i maximisation of user's net benefit.As a result of the simulation, we showed the optimal speed and technical options in both cases.