台湾岛西部平原工厂林立,工业占全省90％以上,人口密集,占全省80％以上。人和货物的交流,使处于该地区的一号省道交通量迅猛增长。因该路沿线房屋林立,建设已成定型,拆迁拓宽极为困难。即使拓宽后,所能增加的交通量仍属有限,难以适应发展需要。为彻底解决台湾西部走廊日益严重的交通问题,乃有另建新路之议。世界银行专家曾于1963年到台湾进行运输调查,研讨后认为需规划一条高速公路。亚洲开发银行于1968年两度派代表团到台湾 Taiwan’s western plains factories everywhere, the industry accounted for more than 90% of the province, densely populated, accounting for more than 80% of the province. The exchange of people and goods has resulted in the rapid growth of traffic volume on Route 1 in the area. Because of the houses along the road, construction has become a stereotype, widening demolition is extremely difficult. Even after the expansion, the amount of traffic that can be increased is still limited and it is difficult to meet the development needs. In order to completely solve the increasingly serious traffic problem in the western corridor of Taiwan, there is a proposal to establish a new road. Experts from the World Bank conducted a transport survey in Taiwan in 1963 and considered that a highway should be planned. The Asian Development Bank sent its delegation to Taiwan twice in 1968