Coordinate - Trans,
CoorŲ+ (MM->2->5)
<- # ErlyYld
Offset RetHld
Flt MinPermV/P | ||||||||||||
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The coordinated phase is designated in the Split Table (MM->2->7). The coordinator references the offset given in the Pattern Table (MM->2->4) to either the beginning of the coord phase (BegGRN) or the end of the coord phase (EndGRN). Typically, the offset Reference is a system-wide reference and set to BegGRN or EndGRN for all patterns; however, the Reference value determines where the available slack time is placed using CIC (before or after the coord phase).
| ErlyYld |
Early Yield (0-25)
allows the NTCIP modes of
coordination to yield prior to the coordinated phase(s) force off point. Values of 0 to 25 seconds are allowed.
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| Offset | The Offset (0-255) references the sync point (Local=0) to either the beginning of green (BegGRN) or the end of green (EndGRN) of the Coord Phase specified in the Split Table for the pattern. |
| RetHld | Retrun Hold applies only to FIXED force-offs and causes a hold to be placed on the Coord Phase if the controller returns to the coordinated phase early in the cycle. This prevents the controller from leaving the Coord Phase to service other phases before the end of the coordinated movements. The same effect can be accomplished by setting the MAX mode setting for the coord phase in the Split Table. |
| Flt |
This option allows the FIXED
and FLOAT force-off method under MM->2->1 to be varied by pattern. If
you set the force-off method to FIXED under MM->2->1, you can override it
and set FLOAT on a patern-by-pattern basis by setting Flt to "X"
from this menu.
This feature is useful for 4-way intersections where the primary movement is on one arterial at one time-of-day (FLOAT desired to return slack time to the major arterial), but other times of the day, traffic is balanced on both arterials (FIXED desireable). |
| MinPermV/P |
These
options allow you to specify the minimum permissive window for vehicles
and/or pedestrians by programming an "X" in the column labelled "V" (for
Vehicles) or under "P" (for Pedestrians).
The NTCIP mode of coordination maximizes the permissive window for vehicle and ped calls and keeps the window open as long as possible and still insure that the minimum phase times can be serviced as shown below: Setting this option for vehciles closes the permissive window for vehicle calls after the end of the previous phase in the sequence (assuming this phase has run until it's force-off). Setting this option for pedestrians insures that the permissive window for is closed for pedestrian pedestrian call if the ped call has not been placed prior to the start of green for that phase.
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