A Hybrid PSO-Fuzzy Model for Determining the Category of 85th Speed

Table 1

The integrated factors and corresponding parameters, types (crisp or fuzzy), symbols, and type of effect on the 85th speed value.

Integrated factor	Parameter	C/F*	Symbol	Effect
Width	Pavement width	C	PW	Direct
	Shoulder width	C	SW	Direct
Length	Overtaking	C	OV	Indirect
	Access point	C	AP	Indirect
Roadside	Type	F	TF	Direct
Land use	Condensation	F	CF	Direct

∗C: crisp, F: fuzzy.