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Fields for table: RPPIF_NALS_ANNUAL

Field NameCodesData TypeUnitsTest ProtocolDescription
STATE_CODE
STATE_PROVINCENUMBER(2)


Numerical code for state or province. U.S. codes are consistent with Federal Information Processing Standards.
SHRP_ID

VARCHAR2(4)


Test section identification number assigned by LTPP program. Must be combined with STATE_CODE to be unique.
YEAR

NUMBER(4)


The year to which the RPPIF applies.
LANE_TRF

NUMBER(1)


Number of the lane for which the data was collected.
DIR_TRF
DIR_TRFNUMBER(1)


The direction to which the lane applies.
VEHICLE_CLASS
VEHICLE_CLASSNUMBER(2)


Vehicle classification code using 13 bins as described in the FHWA Traffic Monitoring Guide.
AXLE_GROUP
AXLE_GROUPNUMBER(1)


Type of axle to which this data applies.
ANNUAL_RPPIF

NUMBER


The annual value of the relative pavement performance impact factor for the axle group and vehicle class.