From left to right, top to bottom: 2 fixed box cameras (most likely 2 generations of ALPRs: an older (larger/yellowed: which they won’t bother removing, and instead keep for redundancy), and a newer (more capable) model), a ‘Pan Tilt Zoom (PTZ)’, and what appears to be a radar sensor (for detecting objects: possibly serving as a redundancy, during challenging weather conditions). I suspect the radar sensor got installed first (just for perimeter intrusion detection), they added the old ALPR next (to detect patterns in registered license plates); and the rest as an upgrade (including an increased field of view: through the PTZ’s movable head).