实现一个全国大城市间的交通咨询程序，提供对城市信息的编辑，提供列车时刻表和飞机航班表的编辑，提供三种最优决策：最快到达、最省钱到达、最少中转次数到达。-The realization of a national inter-city traffic consultation process, providing information on the city editor, providing the train schedule an

JTT 809-2011 道路运输车辆卫星定位系统平台数据交换 中华人民共和国交通运输行业标准 文档-national industrial standard for transportation, GNSS system for operating vehicles- General specifications for data exchange between platforms

JT809通讯协议文档，介绍与交通部的平台间交换通信协议。-specifications for data exchange between customer platform and administrative platform