Punktförmige Zugbeeinflussung

PZB or Indusi is an intermittent cab signalling system and train protection system used in Germany, Austria, Slovenia, Croatia, Romania, Israel and on one line in Canada.

Developed in Germany the historic short name Indusi was derived from German Induktive Zugsicherung ("inductive train protection"). Later generations of the system were named PZB highlighting that the PZB/Indusi system is a family of intermittent train control systems in comparison with the continuous train control systems including the German LZB (short from German Linienzugbeeinflussung, literally "linear train influencing") that was introduced at the time. The term PZB is short from German Punktförmige Zugbeeinflussung, literally "punctiform train influencing", translated as "intermittent train protection" or officially "intermittent automatic train running control"