求翻译：，由于汽车社会化的时代早在五十年代就开始，在这方面的研究工作也比较早。美国早在五十年代就研究出《道路通行能力手册》，随着计算机技术的飞速发展，北美在交通流模拟技术方面也有很大进展，最近，美国运输研究委员会的研究项目“交叉口改进方案评价指南”，对交叉口问题诊断、方案形成、评价方法和决策方法等问题进行了科学研究是什么意思？

Due to the era of the automobile society in the 1950s began, the research work in this area earlier. The United States in the 1950s developed the "Highway Capacity Manual, with the rapid development of computer technology in the traffic flow simulation technology in North America has made great prog

socialization, because of the times as early as the 50s, research in this field work is also fairly early. As early as the 1950s the United States for the study of road capacity manual, along with computer technology, the rapid development in North America in traffic simulation technology has also b

Because the automobile socialization time as early as starts in the 50's, also compares in this aspect research work early.US as early as studies "Road capacity Handbook" in the 50's, along with the computer technology rapid development, North America flows the simulation technology aspect in the tr

, As the car as early as the 50 's began in the era of the socialization, research in this area is relatively early. United States as early as 50 out of the manual of road capacity, along with the rapid development of computer technology in North America in terms of traffic flow simulation technolog

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