Benefit Evaluation of Preventive Maintenance of Highway Bridges Based on Fuzzy Neural Network

Table 1

Evaluation system of preventive maintenance of highway bridges.

Purpose	First-level indicator	Secondary indicators
The benefits of preventive maintenance of highway bridges	Technical benefits	Safety
		Applicability
		Durability
	Traffic benefits	Reduced vehicle travel time
		Traffic growth
		Traffic growth rate
		Fewer casualties
		Cargo damage is reduced
	People’s livelihood benefits	Residents’ travel convenience
		Surrounding environment improvement
		Cultural landscape preservation
	Economic benefits	Remaining life cycle cost
		Construction cost
		Environmental pollution cost
		Direct economic benefits
		Indirect economic benefits