Included Øs

2.10.2.3 OVERLAP INCLUDED PHASE PARAMETERS - Eight Included Phases can be assigned to an overlap to accomplish the operation described for the overlap type. 

Included Phases are also known as "parent phases" of the overlap. Typically, if an overlap is timing an included phase and another included phase is "next" in the sequence, the overlap will continue to provide a green output which "overlaps" the included phases.  The overlap will only time it's yellow clearance when a non-included phase is next.

Modifier Øs

2.10.2.4 OVERLAP MODIFIER PHASE PARAMETERS - The Modifier Phases parameter allows the entry of up to eight phases that modify the overlap. The function of these phases is described in the Overlap Type description.

Type:NORMAL

Normal overlap - controlled by Included Phases and the Modifier Phases as follows:

• The overlap is green when an included phase is green, or an included phase is timing yellow/red clearance and an included phase is next

• The overlap is yellow when an included phase is yellow and an included phase is not next

• The overlap is red when the overlap green and yellow are not on

• The overlap is dark (all outputs off) when a modifier phase is on during it's green, yellow or all-red interval

Note: The Normal overlap type operates exactly like the "normal" type specified in NTCIP 1202, section 2.10.2.2 OVERLAP TYPE if no Modifier Phase is programmed for the overlap.

Type:-GrnYel

-GrnYel overlap - controlled by Included Phases and the Modifier Phases as follows:

• The overlap is green when an included phase is green and a modifier phase is not green or an included phase is timing yellow/red clearance, an included phase is next, and a modifier phase is not green

• The overlap is yellow when an included phase is yellow, an included phase is not next, and a modifier phase is not green

• The overlap is red when the overlap green or yellow is not on

Note: The behavior of the -GrnYel overlap is similar to the Normal type, except the modifier phase will cause the overlap to go to red, regardless of the state the overlap is in. The -GrnYel overlap type operates exactly like the "minusGreenYellow" type in NTCIP 1202, section 2.10.2.2 OVERLAP TYPE

Type:L-PERM

L-PERM overlap - controlled by Included Phases and the Modifier Phases as follows:

• The overlap turns green when an included phase, that is not a modifier phase, turns green

• The overlap remains green as long as one of the included phases remain green

• The overlap is yellow when an included phase is yellow and an included phase is not on or next

• The overlap is red when it is not green or yellow.

• L-PERM Type: Ø2 Modifier Inhibits Overlap Green When Ø1 is Lagging L-PERM Type: Ø2 Modifier Does Not Inhibit the Overlap When Ø1 is Leading

Note: This overlap was developed in Arlington Texas to suppress the permissive green in a five section left-turn signal during lead/lag operation. The opposing protected left-turn phase can be programmed as a modifier phase to suppress the solid green indication on the lag-turn side until the adjacent through direction receives a green.

Type:FL RED

FL RED overlap - controlled by Included Phases and the Modifier Phases as follows:

• The overlap is green when an included phase is green, or an included phase is timing yellow/red clearance and an included phase is next

• The overlap is yellow when an included phase is yellow and an included phase is not next

• The overlap is flashing red when the overlap green or yellow are not active, the modifier phase is green, and the modifier phase is not in ped clearance, or walk.

• The overlap is dark when the overlap is not green, yellow, or flashing red

Note: This overlap was developed for the City of Cupertino, CA and can also be used to accomplish the flashing yellow arrow left-turn display recommended by NCHRP 3-54 (see http://www.kitelson.com/pplt)

Type:FAST-FL

The FAST-FL overlap is identical to the FL RED overlap, except the flash rate is programmable using the Fast Flash Rate parameter in menu MM->1->5->1.

Type:PED_1

The ped overlap provides a pedestrian channel output which is a combination of two or more consecutive phases in a ring sequence. The order that the parent phases are assigned to the table in this screen is important when defining a ped overlap.

If each parent phase defined is consecutive in the sequence, the the ped overlap walk indication will time with the walk setting programmed for the first parent phase in the sequence.  The flashing don't walk will begin with the first parent phase and end with the time programmed for the last parent phase in the sequence.

If parent phases are assigned to a ped overlap and are not consecutive in the sequence, the ped overlap will time the walk and ped clearance of each parent phase.  This is useful only if you want the pedestrian indication to be serviced more than once per cycle.

Ped 1 Overlap Type With Included Phases 5, 8 Ped 1 Overlap Type With Included Phases 8, 5

Type:R-TURN

The R-TURN overlap is controlled by the Included Phases and the Modifier Phases as follows:

• The overlap turns green when an included phase is green that is not also a modifier phase

• The overlap remains green if the next phase is also an included phase

• The overlap goes from green to red, without yellow, when the included next phase that is also a modifier phase turns green

• The overlap is yellow when an included phase is yellow, and an included phase is not next

• The overlap is red when the overlap is not green or yellow, or modifier phase is green

Note: The R-TURN overlap provides the following operation when a non-conflicting left-turn phase and the through movement associated with the right turn are programmed as Included Phases.  In this case, the through movement associated with the right turn is programmed as the Modifier Phase:

1. If the non-clonflicting left-turn is ON and the through movement is next, the overlap provides a  right-turn arrow that switches immediately to red when the through indication turns green.  In this case, the 5-section right-turn display displays a protected green arrow that switches immediately to a solid green ball without a yellow clearance indication.
   

2. If the through movement is ON and the non-conflicting left-turn phase is next, the overlap will display a green indication when the through movement begins timing yellow clearance and will continue to display a green for the protected right-turn until the end of the non-conflicting left-turn phase. 

3.  

Grn:

2.10.2.5 OVERLAP TRAILING GREEN PARAMETER - This parameter extends the overlap green for 0-255 sec after the included phases terminate and the controller moves to the non-included phases.

Yel:

2.10.2.6 OVERLAP TRAILING YELLOW CHANGE PARAMETER - This parameter determines the length of time (0-25.5 sec) that the overlap is yellow following a Trailing Green extension.

Note: If “Parent ø Clearances” under MM->1->5->2->1 is set to ON, the overlap uses the yellow clearance of the parent phase.  Naztec provided the MIB, “Parent ø Clearances” to simplify programming the overlaps.

Red:

2.10.2.7 OVERLAP TRAILING RED CLEAR PARAMETER - This parameter determines the length of time (0-25.5 sec) that the overlap is in the red clearance interval following the Trailing Yellow clearance.

Note: If “Parent ø Clearances” under MM->1->5->2->1 is set to ON, the overlap uses the all-red clearance of the parent phase.  Naztec provided the MIB, “Parent ø Clearances” to simplify programming the overlaps.