GENERAL NOTES
SUMMARY OF XSF FLAGS
XSF 1 - Auto introduce Pedestrian 1
SIGNAL GROUP OPERATION
Signal Group 4
Signal Group 4 is a 3-aspect (green / yellow / red) partially controlled right turn (conditional red) at all times.
Signal Group 4 operates green / yellow / red in CØ and is switched to “blank” during AØ as described below.
Signal Group 4 red will be switched to blank at the end of AØ Late Start period if Pedestrian 1 is not operating.
If Pedestrian 1 does operate in AØ, Signal Group 4 is held red in AØ while Timer 1 is timing. Timer 1 starts timing at the start of Pedestrian 1 Walk using Special Purpose Timesetting No. 9. When Timer 1 expires, Signal Group 4 red will be switched to blank.
The value of AØ Early Cut Off is used to guarantee a minimum blank period for Signal Group 4 in AØ. Timer 2 starts timing at the start of Signal Group 4’s blank period using Special Purpose Timesetting No. 10. When Timer 2 expires, AØ Early Cut Off will be expired.
** Do not alter one of AØ ECO or Special Purpose Timesetting No.10 without regard for the other.
If going from AØ to BØ, Signal Group 4 will be switched to red at the start of Signal Group 2 Red (AØ Red) and will be held red throughout BØ.
If going from AØ to CØ, Signal Group 4 will remain blank during AØ Red before turning green in CØ.
Signal Group 5
Signal Group 5 Late Starts in BØ (from AØ).
PEDESTRIAN GROUP OPERATION
Pedestrian 1
P1 demands AØ.
P1 introduces at the start of AØ.
P1 auto introduces at the start of AØ if XSF 1 is set.
P1 cannot reintroduce if demanded when resting in AØ – instead place a call for BØ to service P1 at the next start of AØ.
Pedestrian 2
P2 demands BØ.
P2 introduces at the start of BØ.
PHASE OPERATION
Substitute AØ Yellow for CØ Yellow when transitioning CØ -> BØ.
Expire BØ Late Start when transitioning CØ -> BØ.
DETECTOR OPERATION
Detector 6
Detector 6 places immediate locking calls for AØ and places non-locking calls for CØ when its presence time expires.
Detector 8
Detector 8 places locking calls for CØ.
Clear calls for CØ from Detector 8 during Signal Group 3 green and yellow and during Signal Group 6 green and yellow.
In AØ, if BØ is demanded (via Pedestrian 2 and/or Detectors 7 & 9), then clear demand for CØ from Detector 8.