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ST750
G
ENERAL
H
ANDBOOK
667/HB/33750/000
Page 34
Issue 6
MIN
Amber
PAR
PBT
3
2
CDY0
Red
Green
Red
R/A
Green
Green
Red
Ped:
Max Change
Gap Change
On-Crossing Detector:
Veh:
IPX
2
CDY1
CMX
Red
R/A Green
Red
On intersections, the appearance of the vehicle phase will be delayed further if the
IGN intergreen time is larger than PBT plus the red/amber period.
3.1.3 Far Sided Pedestrian Crossing
The vehicle to pedestrian intergreen on a stand-alone crossing is controlled by PAR.
However if the far-sided pedestrian phase is part of an intersection stream, then this
period is controlled solely by the IGN intergreen command.
The pedestrian to vehicle blackout clearance period consists of:
•
a minimum period governed by PBT p,
•
an extendable period limited to a maximum governed by CMX p,
•
a gap clearance delay CDY p 0*, or
•
a max clearance delay CDY p 1
where ‘p’ is the pedestrian phase letter.
Following this blackout clearance period, there is a clearance all-red period CRD p.
* The gap clearance delay CDY p 0 is usually set to zero and hence is not shown
on the following diagram.