通过中国公路信息服务网,出行者可以很方便地查询出行路线的路况情况。目前,北京、上海等国内主要城市都已经或正在开展智能交通及交通信息服务系统的研究与建设,建立相应的市内路况信息服务系统和网站,实时播报市内主要道路的交通路况,为公众提供出行信息服务。但是,这些系统大多局限于某个城市或区域,覆盖范围有限,并且大都尚处 Through the China Highway Information Service Network, travelers can easily check the road conditions of travel routes. At present, major cities in Beijing, Shanghai and other major cities in China have been or are developing intelligent traffic and traffic information service system research and construction, the establishment of the corresponding city traffic information service system and website, real-time broadcast of the main roads in the city traffic conditions for the public Provide travel information service. However, most of these systems are limited to a single city or area with limited coverage and are mostly still