Identification of Accident Blackspots on Rural Roads Using Grid Clustering and Principal Component Clustering

Table 3

Results of principal component analysis of accident unit.

Unit	1	2	3	4	5	6	…	53	54	55	56
Comp1 accident risk level	0.25206	0.10617	0.18704	0.17621	0.00126	1.05557	…	0.12078	0.00294	0.00168	0.00797
Comprehensive risk level	0.20583	0.0867	0.15273	0.14389	0.00103	0.86198	…	0.09863	0.0024	0.00137	0.00651

The higher the value of the comprehensive evaluation, the more dangerous the road segment, while the lower the value of the comprehensive evaluation, the safer the road segment.