A pavement GPR system provides a fast, non-destructive way to evaluate roadway conditions and collect continuous subsurface data. This guide explains how pavement ground penetrating radar works, from antenna frequency and layer thickness measurement to detecting voids, moisture, stripping, debonding, and hidden utilities. It also explores high-speed data collection, reduced pavement coring, improved field safety, hardware configurations, software capabilities, and calibration requirements. By understanding these factors, engineers and infrastructure managers can select the right pavement GPR system for efficient roadway inspection and long-term pavement management.