Editing Cab signalling (section)

=== Intermittent ===
The German [[Indusi]] and Dutch [[Automatische treinbeïnvloeding|ATB-NG]] fall into this category. These and other such systems provide constant reminders to drivers of track conditions ahead, but are only updated at discrete points. This can lead to situations where the information displayed to the driver has become out of date. Intermittent cab signalling systems have functional overlap with many other [[train protection system]]s such as trip stops, but the distinction is that a driver or [[Automatic Train Operation|automatic operating system]] makes continuous reference to the last received update.