From: Spatial inequity in access to healthcare facilities at a county level in a developing country: a case study of Deqing County, Zhejiang, China
Road class
1st
2nd
3rd
4th
substandard
Land cover
Hill
Speed(km/h)
80
60
40
30
20
5
3
Timea (min)
0.0375
0.05
0.075
0.1
0.15
0.6
1