Estimation of Landslides and Road Capacity after August 8, 2017, MS7.0 Jiuzhaigou Earthquake Using High-Resolution Remote Sensing Images

Table 3

Postearthquake road capacity scheme.

Grade	Road capacity	Road width ratio:	Criterion
I	Almost normal road	80% ＜ ≤ 100%	The road surface is almost normal. Vehicles can pass through in succession.
II	Damaged but accessible road	50% ≤ ＜ 80%	The road surface is partially damaged. Vehicles can pass through.
III	Damaged and interrupted road	20% ≤ ＜ 50%	The road surface is severely damaged. Vehicles cannot pass through.
IV	Ruined road	0 ≤ ＜ 20%	The road surface is ruined.