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Publication Number: FHWA-RD-03-041

Evaluation and Analysis of LTPP Pavement Layer Thickness Data

Description Below

Figure 1 in page 14 illustrates the essential data fields and relationships between different tables (TST_AC01_LAYER, TST_PC06, SPS*_LAYER, INV_LAYER, RHB_LAYER, TST_L05B, and TST_L05A) for LTPP layer thickness data with Table TST_L05B establishing the final pavement layer structure (all layers, descriptions, material types, and representative thicknesses) for each test section using the data in those tables. The function and the essential data fields in each of those layer thickness data tables are listed as follows.