LTPP Logo Long Term Pavement Performance Logo

LTPP TSSC Home

Data User's Corner





LTPP TABLE NAVIGATOR: Field View


Fields for table: NALS_ANNUAL_DISTRIB

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.
PERCENT_AXLES

NUMBER(5,2)
%

The percentage of axles whose weight falls in the range described with Weight_Bin_Low and Weight_Bin_High.
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 axle distribution 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.
WEIGHT_BIN_LOW

NUMBER(6)


The lowest weight for an axle included in this bin.
WEIGHT_BIN_HIGH

NUMBER(6)


The highest weight for an axle included in this bin.