Grade Ⅰ Road  一级路面

Grade Ⅱ Road  二级路面

Grade Ⅲ Road  三级路面

High Grade Road  高等级公路

High-grade Road  高等级道路; 高等级公路

Road Grade Separation  道路立交

Elevated Road over At-grade Roundabout  高架-地面环交

grade separation of ring road  匝道立交桥

road crisscross intersection at grade  十字形平面交叉口

Road sub grade widening  路基拓宽

Tongliao-Lubei Grade I road  通鲁一级公路

the Western Ring Road Sector of Central Ring Road  中环线西环段

First-grade and third-grade highway  一、三级公路

Gum Rosin N GRADE OR WW GRADE  松香

the method of mixing different grade dies el to change diesel grade  兑油提号法

# form road network  井字形通道; 阻燃

2D road network model  2D公路网模型

301 country road  301国道

312 National Road  312国道