Hazard ahead
It’s important that a train driver takes note of signals and disruptions so that the vehicle can be slowed or stopped in advance, or diverted to a safe track. To make sure these signals have been acknowledged, sensors in the track can respond to unexpected activity. For example, if motion is detected at a time when a train isn’t supposed to be passing into a new section of the track, or a train is moving faster than it should be, it will alert the driver by sounding an alarm.