GENERAL NOTES
SUMMARY OF XSF FLAGS
XSF1 Auto Introduce P1 at start of AØ.
GENERAL OPERATION
Substitute AØ Yellow for CØ Yellow when going from CØ to BØ.
SIGNAL GROUP OPERATION
SIGNAL GROUP 4  
Signal Group 4 is a 3-aspect (green / yellow / red) partially controlled right turn 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.
PEDESTRIAN GROUP OPERATION
Pedestrian 1
P1 demands AØ.
P1 can introduce at the start of AØ.
P1 auto-introduces at the start of AØ if XSF1 is set.
P1 cannot re-introduce in AØ if demanded – instead place a call for BØ to service P1 at the next start of AØ.
Pedestrian 2
P2 demands BØ.
P2 can introduce at the start of BØ.
DETECTOR OPERATION
Detector 7
Places locking calls for AØ.
Places non-locking calls for CØ when its presence time expires
Detector 8
Places locking calls for CØ
Clear calls for CØ from Detector 8 during BØ Green and Yellow.