The phenomenon of heavy-duty traffic appears in recent years, which causes fatigue and rut and so on in bituminous pavement and debases service life and level of pavement.

• 高等级公路上繁重的交通量以及近年来出现的重载、超载现象，造成了沥青路面的疲劳、车辙等破坏，降低了路面的使用寿命和服务水平。