Defects

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Operational Failures

These are defects involving rolling stock - things like locomotive power failures, defective brakes, and so on.

Infrastructure Failures

These are defects involving the railway infrastructure - things like signal lamps not working, switches not being thrown or not locking, and so on.

For each type, its chance of being chosen is defined only by the numerator. This makes it easier to add new failure types, as the chance of occurring is relative to the sum of all the other chances.

Just like with the operational failures, when an irregularity type is chosen, the sim decides (pseudo-randomly) whether the failure will actually occur. If you imagine playing with a pair of dice, you can think of the sim making two rolls: first, to determine which type of failure to attempt, and a second roll, to determine whether the failure actually occurs. Below, the "relative chance of occurring" relates to the first roll of the dice. The second roll depends on the type of failure - some types are more likely to happen under certain conditions. For example, switch obstructions are more likely when it's cold.

SignalOneFilament

Not Currently Implemented.

Relative chance of occurring: 5/x.

SignalAllFilaments

Not Currently Implemented.

Relative chance of occurring: 5/x.

SwitchObstruction

Implemented in Kleinstadt and BETA builds.

Relative chance of occurring: 5/x.

When a switch obstruction occurs, about 5% of the time, it will be obstructed in both the normal and reverse positions. Otherwise, there's an equal probability that it's obstructed in the normal or reverse position. The probability that a switch obstruction is executed is doubled when it is cold.

To resolve, a technician must be called.

SwitchDefectiveEndContact

Implemented in Kleinstadt and BETA builds.

Relative chance of occurring: 5/x.

When this type of failure occurs, about 5% of the time, it will be happen with both the normal and reverse end contacts. Otherwise, there's an equal probability that it's obstructed in the normal or reverse position.

To resolve, a technician must be called.

SwitchOutOfCorrespondenceAfterTrain

Not Currently Implemented.

Relative chance of occurring: 5/x.

LampIsDefective

This failure only applies to the GRS-NX (Dutch) panels.

Relative chance of occurring: 5/x.

This failure resolves itself automatically, between 30 minutes and 2 hours after it occurs.

TrackOccupationSpontaneous

Relative chance of occurring: 5/x.

With this failure, a short cut is added to a track circuit, making it appear occupied when it is not. This failure resolves itself automatically after 2-10 minutes. This failure affects boundary tracks without axle counters.

TrackOccupationAfterTrain

Relative chance of occurring: 5/x.

With this failure, a short cut is added to a track circuit, making it appear occupied when it is not. This failure only happens when a track is occupied by a train. The effect is that when a train leaves a track, it remains occupied. This failure resolves itself automatically after 2-10 minutes.

ExitLockLightPersistence

Not Currently Implemented.

Relative chance of occurring: 5/x.

CatenaryGroupFailure

Relative chance of occurring: 5/x.

This failure occurs in sims where the "CatenaryExpert" option is disabled, preventing the dispatcher manual control over catenary operations. The simulation must have catenary groups.

When this failure is scheduled to occur, a random catenary group will experience a failure - power will disappear for between 2-12 minutes.

PanelLightDefect

Implemented in GENERIC and BETA builds.

Relative chance of occurring: 5/x.

This failure finds a random tile with a random bulb in that tile and makes "burnt out". To resolve, the dispatcher must right-click on the tile to choose the option "Fix Light Bulb." This process, like in real life, takes some time.