The presence of oversize rocks in the primary crusher can lead to costly downtime and lost production. LoadWise is an automated oversize detection system which can detect oversize ore in the pit as the truck is loaded. This allows trucks to be diverted, preventing crusher downtime. The system provides a simple, hardware and software solution that can quickly be retrofitted to any vehicle straight out of the box. It can provide alarming and indication of a potential crusher blockage event in real- time. In contrast to camera-based systems and other immature prototype solutions, LoadWise is a highly reliable system which can be configured to achieve specific truck diversion rates and material throughput targets.