地铁票务信息平台的拓展利用

论述南京地铁票务收入三级管理模式(清分结算中心ACC-线路中心LC-车站SC).通过描述运营网络化后采用原有模式的弊端,分析票务平台的引入对原有票务管理流程模式的优化,解决原有模式带来的问题,带来经济效益并保护了环境.给出票务信息平台的架构设计,详细罗列票务信息平台的实现功能.实践表明,该票务信息平台符合实际应用要求,不仅满足现有线路的实际需求,而且具有良好的可维护性、可扩展性,可以方便未来新线路的接入.     

Handling Cut-In Vehicles in Strings of Cooperative Adaptive Cruise Control Vehicles

Cooperative adaptive cruise control (CACC) systems are a candidate to improve highway capacity by shortening headways and attenuating traffic disturbances. Although encouraging results have been obtained until now, a wide range of traffic circumstances has to be investigated in order to get reliable CACC systems driving on real roads. Among them, handling both vehicle-to-vehicle (V2V) communications-equipped and unequipped vehicles merging into the string of CACC vehicles is a commonly mentioned challenge. In this article, an algorithm for managing the transitions in response to cut-ins from V2V- or non-V2V-equipped vehicles is developed and tested using a string of four CACC vehicles. A CACC controller is implemented in four production Infiniti M56s vehicles and tested in real traffic, where non-V2V-equipped vehicles can cut in. The effects of a vehicle performing a cut-out are also investigated. Then responses to cut-ins by equipped and nonequipped vehicles are simulated for longer strings of vehicles using car-following models for both the production adaptive cruise control (ACC) system and the newly developed CACC controller. Results demonstrate that the CACC system is able to handle cut-in vehicles without causing major perturbations, while also reducing significantly the impact of this maneuver on the following vehicles, improving traffic flow.