Development of a Safety Evaluation Model for Provincial Highway

Table 3

Weights of comprehensive evaluation on provincial highway.

Rule layer			Index layer
Index	𝑊𝑖	Weight	Subindex	𝑤𝑖𝑗	Combined weight
Accident severity	𝑊1	0.47	—
Geometric feature	𝑊2	0.28	Horizontal curve	𝑤12	0.23
			Sight distance	𝑤22	0.21
			Longitudinal slope	𝑤23	0.31
			Lane width	𝑤24	0.13
			Shoulder width	𝑤25	0.12
Traffic facility	𝑊3	0.15	Traffic sign	𝑤31	0.3
			Traffic marking	𝑤32	0.13
			Guiding facility	𝑤33	0.2
			Safety facility	𝑤34	0.37
Traffic environment	𝑊4	0.10	Crosswalk	𝑤41	0.32
			Traffic volume	𝑤42	0.45
			Heavy vehicle ratio	𝑤43	0.23