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

Table 3

Reference value of index system classification standard.

Index		Maintenance benefit level
		One	Two	Three	Four	Five
Safety	Basic features	Excellent	Good	General	Poor	Very poor
	Reference	>95	95∼85	85∼80	80∼75	<75
Traffic growth rate	Basic features	Excellent	Good	General	Poor	Very poor
	Reference	>100%	100%∼40%	40%∼10%	10%∼0%	<0%
Resident satisfaction	Basic features	Excellent	Good	General	Poor	Very poor
	Reference	>90	90∼80	80∼70	70∼60	<60
Construction cost	Basic features	Excellent	Good	General	Poor	Very poor
	Reference	>90	90∼80	80∼70	70∼60	<60