Machine Learning and Statistical Test–Based Culvert Condition Impact Factor Analysis

Table 1

Culvert inspection frequencies.

	Factor considered	Frequency
FWHA	—	Every 2 years
ODOT	Span and condition	3-tiered
NYDOT	Overall condition	3-tiered
MnDOT	Span and overall condition	12–24 months
IDOT	Span and overall condition	Every 5 years
MDOT	Overall condition	Every 2 years or 4 years