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Find Sections (a.k.a Section Filters) provides filter criteria to narrow down the selection of LTPP test sections. Users can apply filters from multiple classifications at the their discretion. Selected Section Count is updated in real-time as the user applies filters. Users can also save filters for future use or export them to share filter criteria with others.
The MEPDG Inputs feature is designed to provide the performance data and inputs from the LTPP database for the AASHTOWare Pavement ME software. This will allow the user to run comparisons of model predictions against the actual performance data from LTPP test sections. In addition, users can implement the actual performance data from corresponding LTPP sections in order to calibrate AASHTOWare distress models to the local conditions. The initial step in the design of this feature is to show a proof of concept for LTPP GPS-3 and SPS-2 JPCP sections.
MEPDG Inputs
The MEPDG Inputs feature is designed to provide the performance data and inputs from the LTPP database for the AASHTOWare Pavement ME software. This will allow the user to run comparisons of model predictions against the actual performance data from LTPP test sections. In addition, users can implement the actual performance data from corresponding LTPP sections in order to calibrate AASHTOWare distress models to the local conditions. The initial step in the design of this feature is to show a proof of concept for LTPP GPS-3 and SPS-2 JPCP sections.
There are 2581 of 2581 sections currently selected.
Total selected.
MEPDG Inputs (for AASHTOWare Pavement ME) for Section:
Input
Value
Table
Field
Help Notes
Traffic
Initial AADTT
TRF_HIST_EST_ESAL
AADT_TRUCK_COMBO
(for YEAR_HIST_EST=Min)
Since table TRF_MON_EST_ESAL and TRF_HIST_EST_ESAL contains information on the number of trucks in the truck lane, no adjustments for a two-way traffic and lane distribution is required. Therefore, the appropriate adjustment factors are set to 1, or 100%. The initial AADTT and the growth rates are obtained by matching the available AADTT data with the compound growth model.
The virtual weather station can be obtained for the LTPP section location by interpolation from the nearby weather stations. For future versions, the climatic data may be extracted from other sources like MERRA.
Longitude
(degrees.minutes)
SECTION_COORDINATES
LONGITUDE
Elevation
(ft)
INV_ID, SPS_ID
ELEVATION
Depth of water table
(ft)
SMP_WATERTAB_DEPTH_MAN
WATERTAB_DEPTH
Water table depth collected as a part of Seasonal Monitoring Program (SMP) is provided for those LTPP sections. The depth of water table is assigned based on experience and better guidelines is required for this input.
Structure (Design Features)
Joint spacing
(ft)
INV_PCC_JOINT or SPS2_PCC_JOINT_DATA
AVG_CONTRACTION_ SPACING
The Inventory table contains information provided during the nomination process or when section is included in the LTPP program. The average joint spacing computed using the PONIT_LOC field in the MON_DIS_JPCC_FAULT table is provided for verification purpose.
MON_DIS_JPCC_FAULT
POINT_LOC and CRACK_OR_JOINT
Sealant type
INV_PCC_JOINT or SPS2_PCC_JOINT_DATA
TRANSVERSE_SEAL_TYPE
The sealant type and determination of whether a joint was sealed was captured in the inventory tables at the time the section was nominated or included in the LTPP program. However, some sections where maintenance was performed, MNT_PCC_JOINT_RESEAL table in the JOINT_SEAL_TYPE table information is also provided.
MNT_PCC_JOINT_RESEAL
JOINT_SEAL_TYPE
Dowel diameter
(in)
INV_PCC_JOINT or SPS2_PCC_JOINT_DATA
ROUND_DOWEL_DIAMETER
Edge support
INV_SHOULDER or SPS_GENERAL
SH_SURFACE_TYPE,
SH_SURFACE_TYPE_ OTHER,
I_SH_SURFACE_TYPE,
I_SH_SURFACE_TYPE_ OTHER,
O_SH_SURFACE_TYPE,
O_SH_SURFACE_TYPE_ OTHER