引言 1999年10月、上海市交通工程学会专家代表团赴日访问考察期间,日本交通工学研究会会长越正毅先生赠送《缓解堵塞的良方》一书,经作者编译,以飨读者 日本是由四个主要岛屿和大量的小岛屿组成,国土资源短缺,人口密度极高(全国面积为37.8万平方公里,人口1.2亿)。伴随着城市化及经济发展给交通带来了巨大压力,日本早晚高峰时机动车的平均速度,在地方性城市大约为24公里/小时,在人口密度高的都市圈内不超过21 Introduction In October 1999, during a visit to Japan by a delegation of experts from Shanghai Institute of Traffic Engineering, Mr. Yuezheng Yi, president of the Japan Society of Transportation Engineering presented a book entitled “A Good Way to Relieve Clogging” compiled by the author to readers in Japan. Consisting of four major islands and a large number of small islands, the country has a shortage of land and resources and a very high population density (378,000 square kilometers in the country with a population of 120 million). With the urbanization and economic development has brought tremendous pressure on transport, the average morning and evening peak motor vehicles in Japan, in the local city about 24 km / h, in the densely populated metropolitan area does not exceed 21