日本是在第二次世界大战后的第十年,经济还处于非常困难的条件下开始高速公路修筑工作的。至1986年,全国已建成高速公路国道3,720.9公里,城市间高速公路331.8公里,本州至四国联络道38公里。到21世纪初,全国高速公路发展规化拟定为14,000公里。日本的第一条高速公路名神(名古屋至神户)高速公路于1965年修建完成。该高速公路建成后,车辆纷纷涌入高速公路行驶,交通潮量超过设计的3倍,交通事故急剧增加。到1968年东名高速公路(东京世田谷区至爱知县小牧市)等又相继建成。为了有效地解决不断增加的交通死亡事故,日本政府 Japan started the highway construction work in the tenth year after World War II under the very difficult economic conditions. By 1986, the country had built 3,720.9 kilometers of freeway national highways, 331.8 kilometers of inter-city highways and 38 kilometers of contact lines between the state and the four countries. By the beginning of the 21st century, the development of national expressways will be formulated at 14,000 km. Japan’s first motorway highway (Nagoya to Kobe) highway was completed in 1965. After the completion of the expressway, vehicles flooded into the expressway and the traffic volume surpassed three times the design. Traffic accidents increased sharply. To 1968 Tomei Expressway (Tokyo Setagaya to Aichi Komaki) have also been completed. In order to effectively solve the growing traffic fatalities, the Japanese government