Raw and Load-Normalised Traffic Speed Deflectometer (TSD) Datasets for Provincial Route P21 (Km0.000 - Km36.207), KwaZulu-Natal, South Africa
Description
This repository contains raw and load-normalised Traffic Speed Deflectometer (TSD) datasets collected on Provincial Route P21 (Km0.000 - Km36.207) in KwaZulu-Natal, South Africa. The repository includes the original TSD survey measurements, processed pavement deflection basin ordinates, and derived pavement structural response parameters, including D₀, Base Layer Index (BLI), Middle Layer Index (MLI), and Lower Layer Index (LLI). The datasets support transparent and reproducible reconstruction of pavement deflection basins from raw slope measurements using trapezoidal numerical integration and load normalisation procedures. Separate worksheets are provided for the positive and negative survey directions, together with route referencing, environmental measurements, load information, quality indicators, and spatial coordinates. This dataset accompanies the associated Data in Brief article and is intended to support validation of TSD processing methodologies, pavement structural assessment, and future research in network-level pavement evaluation.
Files
Steps to reproduce
1. Open the workbook 01_P21-1_RAW TSD DATA.xlsx and select either the positive or negative survey direction worksheet. 2. Review the route referencing, pavement deflection ordinates, deflection slope channels, environmental measurements, load information, and quality indicators associated with each 50 m survey interval. 3. Convert the recorded deflection slope measurements from µm/m to µm/mm prior to numerical integration. 4. Reconstruct the pavement deflection basin by applying trapezoidal numerical integration between adjacent slope measurement locations, using the far-offset deflection ordinate as the baseline reference condition. 5. Estimate the load-centre deflection (D₀) by extrapolation from the nearest measured slope location, consistent with the methodology described in the accompanying article. 6. Calculate the derived pavement structural response parameters, including the Base Layer Index (BLI), Middle Layer Index (MLI), and Lower Layer Index (LLI), from the reconstructed deflection basin. 7. Compare the reconstructed results with the supplier-provided load-normalised dataset contained in 02_P21-1_NORMALISED TSD DATA.xlsx to verify reconstruction accuracy and reproduce the structural screening outputs. 8. Generate pavement response profiles, median deflection bowls, reconstruction error statistics, and CUSUM or rolling median trends as described in the accompanying publication.
Institutions
- University of the WitwatersrandGauteng, Johannesburg