A Flexible Bridge Rating Method Based on Analytical Evidential Reasoning and Monte Carlo Simulation

Table 1

Common North America and Europe bridge management systems with their bridge condition assessment.

Bridge management system (manual)	Publishing	Assessment grades (rating system)	Meanings of the rating system
National bridge inventory (NBI) [3]	US Department of Transportation	0–9	0: failed condition; 1: imminent failure condition; 2: critical condition; 3: serious condition; 4: poor condition; 5: fair condition; 6: satisfactory condition; 7: good condition; 8: very good condition; 9: excellent condition.
New York BMS [22]	New York Road Department	1–7	1: potentially hazardous; 3: serious deterioration; 5: minor deterioration; 7: excellent or new condition; 2, 4, and 6: between two adjacent ratings.
Bridge Ratings, Inspections and Records Manual (BRIAR) [27]	Department of Transportation, State of Colorado	Poor–Good	Poor: sufficiency rating less than 50 and status of structurally deficient or functionally obsolete. Fair: sufficiency rating from 50 to 80 and status of structurally deficient or functionally obsolete. Good: all remaining major bridges that do not meet the criteria for poor or fair.
Ontario Structure Inspection Manual [7]	Ontario Ministry of Transportation	Excellent–Poor	Excellent: in as constructed condition; Good: first sign of minor defects is visible; Fair: medium defects are visible; Poor: severe defects are visible