Guardian Corridor is a bidirectional roadside perception, lighting, and V2X safety system designed to reduce collision risks between vehicles and pedestrians at unsignalized road crossings and other visibility-limited locations. Streetlight-mounted AI cameras and LiDAR detect pedestrians hidden by parked vehicles, building corners, or other obstacles before they become visible to approaching drivers or onboard vehicle sensors. The roadside unit assesses potential conflicts and transmits risk information to vehicles. Driver Monitoring Systems can be used to determine whether the driver has recognized the hazard and, when necessary, provide alerts through in-vehicle interfaces. Simultaneously, the system communicates with pedestrians through adaptive road-surface lighting, directional audio, and roadside displays. The system supports both human-driven and automated vehicles by enabling cooperative safety actions between roadside infrastructure, vehicles, and pedestrians.