Geschwindigkeitsüberwachung Neigetechnik

The train protection system Geschwindigkeitsüberwachung Neigetechnik (German, translated "Speed Control for Tilting Technology") (abbr.

It is installed on numerous lines in Germany along with the traditional Punktförmige Zugbeeinflussung (PZB) intermittent signalling system.

Prior to GNT the tilting control was added as a subset of the Linienzugbeeinflussung (LZB) train protection system that has been in service on high-speed lines since the 1960s.

As such Siemens was tasked to provide ZUB balises[1] that would work on top of the existing line side signalling and their PZB controlled restrictions.

The German network operator Deutsche Bahn has ensured, that tilting information was finally added to the European Train Control System (ETCS) in version 3.4.0 (like it has done and never used in LZB).

In the ETCS mode L2 all information for speed allowance is provided by Radio Block Center (RBC), so there are no additional balises needed and GNT is obvious.

[4] Most lines with Siemens ZUB 122 exist in Southern Germany from Basel to Stuttgart, Frankfurt, Nürnberg, Regensburg.