近年来,随着大城镇建设的发展,我国全国各大城市像北京、上海、广州这样的一线城市,道路越建越多,二三线城市也在进行着大张旗鼓的城镇扩张建设,道路上行使的车辆也愈来愈多,国道交通进出口出现发了料想不到的交通拥堵问题,甚至遇到了瓶颈。 In recent years, along with the development of big cities and towns, many cities in our country like first-tier cities such as Beijing, Shanghai and Guangzhou have built more roads and more and more cities and towns in second and third tier cities are expanding their roads. More and more vehicles, national highway traffic import and export appeared unexpected traffic jams, and even encountered a bottleneck.