This feature is currently implemented for GPS-3 and SPS-2 sections only. Please use Find Sections to select GPS-3 or SPS-2 sections to view data for MEPDG inputs.
MEPDG Inputs (for AASHTOWare Pavement ME) for Section:
Input Value Table Field Help Notes
Traffic
Initial AADTT See other sheets MEPDG_TRUCK_VOL_PARAMETERS AADTT_FIRST_YEAR_LTPP_LANE, TRAFFIC_OPEN_YEAR_EXP_NO, GPS_SPS, EXPERIMENT_NO Only information applying to time in the GPS-3 or SPS-2 experiment is displayed.
Number of lanes in design direction 1 See Notes Since tables MEPDG_TRUCK_VOL_PARAMETERS, MEPDG_AXLE_PER_TRUCK and MEPDG_AXLE_LOAD_DIST_FACTOR contain information on the number of trucks in the LTPP lane, no adjustments for two-way traffic or lane distribution are required. The adjustment factors are set to 1, or 100% as appropriate.
Percent of trucks in design direction (%) 100 See Notes
Percent of trucks in design lane (%) 100 See Notes
Vehicle Class distribution and growth factor See other sheets MEPDG_TRUCK_VOL_PARAMETERS Vehicle_Class,
Veh_Class_Growth_Rate,
Veh_Class_Growth_Function		 The distribution percentage is applied to the first year’s data.
Operational speed (mph) Use Default Use AASHTOWare Pavement ME default
Axles per truck See other sheets MEPDG_AXLE_PER_TRUCK All fields
Axle distribution See other sheets MEPDG_AXLE_LOAD_DIST_FACTOR All fields
Climate
Latitude
(degrees.minutes) 		SECTION_COORDINATES LATITUDE The virtual weather station can be obtained for the LTPP section location by interpolation from the nearby weather stations.
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 POINT_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 		No edge support option for AC shoulder type
Base type TST_L05B LAYER_TYPE
(below LAYER_TYPE=PC) 		LAYER_TYPE =GB (Granular Base), LAYER_TYPE =GS (Granular Subbase), LAYER_TYPE =TB (Treated (Bound) Base), LAYER_TYPE =TS (Treated (Bound) Subbase)
Loss of full friction
(age in months) 		See Notes Use AASHTOWare Pavement ME default
Surface shortwave absorptivity See Notes Use AASHTOWare Pavement ME default
Measured Performance (IRI, Transverse Cracking, Faulting)
Measured IRI
(m/Km) 		Profile Date IRI Average
Measured Transverse Cracks
(Count) 		Survey Date Total Number of Cracks (Sum of TRANS_CRACK_NO_H +
TRANS_CRACK_NO_M +
TRANS_CRACK_NO_L)
Measured Faulting
(mm) 		Survey Date Avg Wheelpath Fault
Traffic MEPDG Report
State Code SHRP ID GPS, SPS Experiment No Open Year End Year Vehicle Class Growth Rate Growth Function Dist Percentage
State Code SHRP ID Vehicle Class Single Axles Tandem Axles Tridem Axles Quad Axles
State Code SHRP ID Axle Group Month Name Vehicle Class Total MEPGD Lg01 MEPGD Lg02 MEPGD Lg03 MEPGD Lg04 MEPGD Lg05 MEPGD Lg06 MEPGD Lg07 MEPGD Lg08 MEPGD Lg09 MEPGD Lg10 MEPGD Lg11 MEPGD Lg12 MEPGD Lg13 MEPGD Lg14 MEPGD Lg15 MEPGD Lg16 MEPGD Lg17 MEPGD Lg18 MEPGD Lg19 MEPGD Lg20 MEPGD Lg21 MEPGD Lg22 MEPGD Lg23 MEPGD Lg24 MEPGD Lg25 MEPGD Lg26 MEPGD Lg27 MEPGD Lg28 MEPGD Lg29 MEPGD Lg30 MEPGD Lg31 MEPGD Lg32 MEPGD Lg33 MEPGD Lg34 MEPGD Lg35 MEPGD Lg36 MEPGD Lg37 MEPGD Lg38 MEPGD Lg39 MEPGD Lg40
State Code SHRP ID Year Vehicle Class Axle Group Record Status Axles Truck
State Code SHRP ID Year Hour Record Status PCT Hourly Adj Factor
State Code SHRP ID Year Month Vehicle Class TRF Data Type Record Status Monthly Ratio
State Code SHRP ID Year Vehicle Class TRF Data Type Record Status Percent of Trucks
State Code SHRP ID Year Open Volume First Years GPS or SPS Experiment No