A Study on Urban Road Traffic Safety Based on Matter Element Analysis

Table 2

The grading standards of the evaluating index.

Evaluation index	Grade I	Grade II	Grade III	Grade IV	Grade V
	Excellent	Good	Medium	General	Poor
	0~0.2	0.2~0.4	0.4~0.6	0.6~0.8	>0.8
(km/km^2)	0~2.5	2.5~3.0	3.0~3.5	3.5~4.5	>4.5
	0~0.5	0.5~0.6	0.6~0.7	0.7~0.9	>0.9
(km/h)	0~10	10~20	20~30	30~40	>40
(standard units/km)	>5.5	4.5~5.5	3.5~4.5	2.5~3.5	0~2.5
(m)	0~5	5~10	10~15	15~20	>20
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
(%)	>0.05	0.04~0.05	0.03~0.04	0.02~0.03	0~0.02
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9
(%)	>0.8	0.7~0.8	0.6~0.7	0.5~0.6	0~0.5
	>0.8	0.7~0.8	0.6~0.7	0.5~0.6	0~0.5
	0~0.2	0.2~0.4	0.4~0.6	0.6~0.8	>0.8
	0~0.6	0.6~0.7	0.7~0.8	0.8~0.9	>0.9