The "Diagonal green arrow" parametrisation is used to control the switch between two display elements depending on a decisive and conflicting display elements. The decisive display element is the main display element (first UN-conditional display element) of a traffic stream.
A flashing safety light and a diagonal green arrow can be specified for a decisive display element. The conflicting display elements of the diagonal green arrow are read from the current intergreen time matrix.
The diagonal green arrow and the flashing safety light are only switched on if the decisive display element is switched on (enable). The green arrow is switched on as long as all conflicting display elements of the green arrow are locked (red). When a conflicting signal element is green, the flashing safety light switches on. Transitions are calculated on the basis of the intergreen and offset times. Switching on and off is not traffic-dependent. Special traffic streams must be provided for traffic-dependent pre- or post-runs that are to be controlled with diagonal green arrows.
Figure 36: Switching example of a diagonal green arrow and a safety flashing light
- As no conflicting display elements have a green light, the diagonal green arrow is also switched on when the decisive display element turns green. The exact start can be regulated with offset times.
- The diagonal green arrow must be switched off so that the conflicting display elements can be switched on. The flashing safety light is switched on at the end of the green arrow as both have an intergreen time of 0 seconds. The conflicting display element is switched on after the intergreen time has elapsed.
- At the end of the conflicting display element, the system switches back to the diagonal green arrow, observing the intergreen times.
- When another conflicting display element is switched on, the system switches back to the flashing safety light.
- If the relevant display element is switched off, the currently active signal is also switched off. In this case, the end offsets come into effect.
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Display |
Identifier |
Values |
Description |
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Decisive display element |
Decisive display element |
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The decisive display element controls the activation of the arrow signal or flasher. These are only switched on when the relevant display element is switched on or shows green. If the relevant display element switches to red, the arrow signal or the flasher are also switched off. |
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List |
All display elements. |
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Yellow flash display element |
Yellow flash display element |
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Enter the ID number of the flasher's display element. |
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List |
All display elements. |
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LT green arrow display element |
LT green arrow display element |
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Enter the ID number of the display element belonging to the arrow signal. |
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List |
All display elements. |