As deep digging and high filling, settlement calculation of high subgrade has been gradually becoming a key problem in the building of high class highway in mountain areas.
由于深挖高填造成填方高度过大，高填方路基沉降逐渐成为山区修建高等级公路迫切需要解决的问题。
Because of many merits, such as higher strength, better water stability, and good for environment protection, lime-ash soil is widely used now in high class highway sub-base.
二灰土因其具有强度较高、水稳性较好和有利于环保等优点，在目前的高等级公路底基层中广泛使用。
Crossing-above bridge is one of the important parts in high-class highway.
跨线桥是高等级公路的重要组成部分。
According to the traffic conditions and the characteristics of traffic accidents on high-class highway in China, the outstanding factor method is put forward to analyze the black spots.
结合中国高等级公路的交通条件与交通事故特点，提出了分析道路交通事故多发点事故成因的突出因素法。
With the rise of highway class and automobile travel speed, high demands are put forward to highway design. People pay more and more attention to comfortableness of highway use.
随着公路等级和汽车行驶速度的不断提高，对公路线形的设计提出了更高的要求，对公路使用的舒适性要求也越来越引起人们的重视。
With the rise of highway class and automobile travel speed, high demands are put forward to highway design. People pay more and more attention to comfortableness of highway use.
随着公路等级和汽车行驶速度的不断提高，对公路线形的设计提出了更高的要求，对公路使用的舒适性要求也越来越引起人们的重视。
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