Punktförmige Zugbeeinflussung

PZB, or Indusi, is an intermittent cab signalling system and train protection system used in Germany, Austria, Slovenia, Croatia, Romania, Israel, Serbia, on two lines in Hungary, on the Tyne and Wear Metro in the UK, and formerly on the Trillium Line in Canada. Developed in Germany, the historic short name Indusi was derived from German Induktive Zugsicherung ("inductive train protection").