Abstract: A monitoring system for a refrigerated container carrying temperature-sensitive cargo. The system includes sensors disposed throughout the container and/or an associated vehicle for measuring parameters of the container or vehicle, including temperature, motion, and fuel efficiency, among many others. The system optionally includes a global positioning system receiver to monitor geographic location. The system communicates with a command center to allow real-time tracking and monitoring of the container. To reduce false positive alerts, the system buffers alerts by at least 30 minutes and blocks signal transmission when the container is located within specified geofences such as loading and unloading sites.