Coordinate - CIC (MM->2->3)
CIC# CoorØ Gr/ASC Ø.1..2..3..4..5..6..7..8 |
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CIC (Critical Intersection Control) is a Naztec feature that allows the coordinator to adjust pattern splits on a cycle by cycle basis using:
the actuated features of the controller, assuming there is "slack time" in the actuated phases, or
measuring the degree-of-saturation of each phase under adaptive control
The method used is implied in the Grow setting. A Grow value of 1-2 implies method 1. and allows CIC to reduce split times 1-2" per cycle and reassign this time to phases that are maxing out. A Grow value of 50-99 implies method 2. sets the level of RTDSocc (real-time degree-of-saturation based on occupancy) used to reduce and extend split times under adaptive control.
The CIC# is assigned to the pattern under MM->2->6 (right menu). Naztec, Inc. is currently developing adaptive control and will include additional documentation on this feature after the software is developed and tested.
FIXED force-offs (without CIC) always transfer "slack time" to the next phase in the sequence. FLOAT force-off (without CIC) always transfers slack time back to the beginning of the coordinated phase. CIC can be used with FLOAT force-offs to provide a dynamic split adjustment that moves "slack time" to the end of the coordinated phase. Moving "slack time" to the end of the coordinated phase tends to improve progression because the start-of-green for the coordinated phases remains the same.