**Ground penetrating radar** provides a fast, non-destructive method for evaluating pavement conditions and supporting data-driven maintenance decisions. This guide explains how GPR for pavement inspection measures layer thickness, evaluates base and subgrade conditions, and detects hidden defects such as stripping, delamination, moisture, and subsurface voids. It also covers bridge deck assessment, buried utility detection, antenna frequency selection, data interpretation, calibration, and cost benefits. By combining continuous subsurface data with targeted coring, engineers can improve rehabilitation planning, reduce unnecessary testing, and manage pavement assets more efficiently.