LTPP Logo Long Term Pavement Performance Logo

LTPP TSSC Home

Data User's Corner





LTPP TABLE NAVIGATOR: Field View


Fields for table: TST_AIR_VOIDS_SECT

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.
AIR_VOIDS_STDEV

NUMBER(5,3)
%

Standard deviation of calculated air voids.
SHRP_ID

VARCHAR2(4)


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

NUMBER(2)


Unique sequential number assigned to pavement layers, starting with layer 1 as the deepest layer (subgrade).
FIELD_SET

NUMBER(2)


Sequential number indicating the field sampling event. Assigned 1 for first sample event and incremented by 1 for subsequent events.
LANE_LOCATION

VARCHAR2(20)


Indication of whether the BSG sample came from the wheelpath (as defined by the Distress Identification Manual) or not.
AIR_VOIDS_AVG

NUMBER(5,3)
%

Average calculated air voids.
AIR_VOIDS_MAX

NUMBER(4,2)
%

Maximum calculated air voids.
AIR_VOIDS_MIN

NUMBER(4,2)
%

Minimum calculated air voids.
NO_RECORDS_AIR_VOIDS

NUMBER(4,2)


Number of records used to calculate average air voids.