Nonparametric Binary Recursive Partitioning for Deterioration Prediction of Infrastructure Elements

Table 3

Explanatory variables used in the BRP method application.

Variable name	Variable description
AGE	Deck age at beginning of time-in-state or observation period, in years
AVGADT	Unweighed average of daily traffic for all bridge inspection records
CONSTRTR	Year of construction
DECKCOND	Deck operational condition
DECKWID	Deck width, in tenths of foot
HWCLASS	Highway class: NHS, major STP, minor STP, and local
LANEPDIR	Number of traffic lanes per direction
NUMSPANS	Number of main bridge spans
REGION	Dummy variable: North = 1, South = 0
SKEW	Bridge skew effect
SPANLEN	Length of the bridge main span
TIS	Time in condition state
TYPE	Deck structural type: simple concrete
WEARSURF	Wearing surface protective systems: concrete, no protective system