Installing sensors on freight cars is the only way to prevent another disastrous derailment like the Feb. Constantine Tarawneh, a mechanical engineering professor who heads the University Transportation Center for Railway Safety at the University of Texas Rio Grande Valley, says adding more wayside hotbox detectors won’t be enough to eliminate derailments caused by wheel bearing failures. ”National Transportation Safety Board Chair Jennifer Homedy says the board’s investigation of the East Palestine derailment will include an analysis of wayside detection systems, how railroads use their data, and whether temperature thresholds should be set at a lower level