Krois-Modell GZ1Spur0, ÖBB Clearance Marker (Gauge 0) – Pack of 6

Prototype:

The clearance marker is a railway signal indicating the limit up to which a track may be occupied where tracks converge. A train may only enter the adjacent track if the occupied track is clear of the clearance marker. The signal box operator verifies this during the route check before authorizing a train movement by setting a signal to proceed. In doing so, they also take into account that a train which has just arrived may "stretch" slightly after stopping due to the relaxation of buffer springs, potentially encroaching back past the clearance marker it had previously cleared. On tracks equipped with track vacancy detection systems, this condition is ensured technically; the insulation limit of track circuits or the axle counter detection point is installed at least six meters behind the clearance marker, rather than directly at it.

The exact position of the clearance marker is determined by the minimum track spacing between the two converging tracks, based on cant (superelevation) and curve radius. Since the clearance marker is relevant only for shunting operations, the minimum track spacing is calculated for shunting speeds; consequently, on standard-gauge railways, it is typically placed where the track spacing is 3.50 meters. On three-rail or four-rail tracks, multiple clearance markers may be present—one each for standard gauge and narrow gauge.

A black-and-white striped post or stone (Austria, Hungary), or sometimes just a white post (Italy).

Model: Colored black and white

Dimensions: LxWxH: 23x5x4.5 mm