1987年4月,美国大跨径桥梁代表团来华同中国公路学会和其他有关专业人员进行了技术交流。期间,美国专家介绍了一些目前美国在桥梁设计、技术及管理上的最新发展。在铁路、航运、公路等交通手段中,美国是比较注重公路交通的国家,美国的公路网络已基本建成,并已经成为全国交通运输的主要设施。目前的主要任务是提高现有公路体系的水平,而桥梁则是公路的咽喉,公 In April 1987, a delegation of U.S. long-span bridges came to China for technical exchanges with China Highway Society and other relevant professionals. During the meeting, U.S. experts introduced some recent developments in the bridge design, technology and management in the United States. Among the means of transport such as railways, shipping and highways, the United States is a country that pays more attention to road traffic. The U.S. road network has basically been completed and has become the major transportation facility in the country. The main task at present is to raise the level of the existing road system while the bridge is the throat of the highway.