Phasing Sequence

Intersection Phases Overlaps Phasing Sequence Permissive Periods Detectors Controller Generation

This is the 4th step in defining a NEMA control using the VS NEMA Wizard.

Having defined phases and overlaps, the phasing sequence can be shown. There is not much to define, but to check if the resulting phase patterns correspond to what was intended.

  • On the upper half of the panel, each half ring can be set to lead or lag. At the same time the pattern resulting of the leading standard NEMA phase and all phases added to it as overlaps can be seen.
  • On the lower half of the panel the resulting phase patterns are shown. The sequence is read from left to right. If two possibilities are shown one above another, the controller might choose which one to use, according to the traffic situation.


Phasing sequence of a standard NEMA configuration

 

© Verkehrs-Systeme AG
updated 17.06.03

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