Research Article
Machine Learning and Statistical Test–Based Culvert Condition Impact Factor Analysis
Table 3
Definitions of input variables.
| Variable name | Definition |
| Age | Age of the culvert | Number of cells | The number of culvert cells | Broken back | Whether the culvert has broken back | Culvert shape | Shape of the culvert | Span | Distance between inside faces of the culvert | Rise | The maximum rise of the culvert | Slope | The slope of the culvert | Length | Length of the culvert | Closed system | Whether the system is closed | Abrasive conditions | The presence of granular material | pH | The pH of the water in the culvert | ADT | Average daily traffic counts | Cover height | Height of cover above the culvert |
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