A.4%
B.6%
C.8%
D.10%
A.4%
B.6%
C.8%
D.10%
A.500m
B.750m
C.1000m
D.1500m
A.0.5%~1.5%
B.1.0%~2.0%
C.1.5%~2.5%
D.2.0%~3.0%
A.1.0~1.5
B.1.5~2.0
C.1.0~2.0
D.1.5~3.0
A.3%
B.6%
C.9%
D.12%
A.120米
B.150米
C.180米
D.200米
A.1.5%
B.2.0%
C.2.5%
D.3.0%
A.提供更好的抓地力
B.帮助排水,避免积水
C.降低建设成本
D.增加视觉美观度
A.车道宽度
B.中央分隔带
C.侧分隔带
D.路肩