Nexgen delivers SRT to generate high‑resolution 2D/3D P‑wave velocity models for near‑surface characterization. The method maps bedrock depth, weathered/fractured zones, faults, rippability, and lateral lithologic changes—informing route selection and foundation design. With dense sensor spreads, advanced inversion, and rigorous QC, we provide dependable interfaces and velocity contrasts for quarries, highways, metros, and industrial sites, reducing uncertainty, optimizing excavation, and minimizing construction risk.