GENERAL NOTES
SUMMARY OF XSF FLAGS
XSF1 - Allows the late introduction of P1 in AØ (Master).
XSF2 - Allows the late introduction of P2 in AØ (Master).
XSF5 - Selects Special Maximum for SG5 and SG8 in CØ (Special Purpose Timesetting no. 9)
              (All modes).
XSF6 - Selects Special Maximum for SG6 and SG7 in CØ (Special Purpose Timesetting no. 10)
              (All modes).
SIGNAL GROUP OPERATION
Signal Group 5
1.     SG5 is controlled by Special Movement Timesetting no. 1 in CØ.
CØ All Red timesetting is substituted for Special Movement Timesetting no. 1.
2.     XSF5 is used to set the maximum extension green time for SG5 in CØ.
This time is stored in Special Purpose Timesetting no. 9.
SG5 is forced off after this maximum extension green time.
Signal Group 6
1.     SG6 is controlled by Special Movement Timesetting no. 2 in CØ.
CØ All Red timesetting is substituted for Special Movement Timesetting no. 2.
2.     XSF6 is used to set the maximum extension green time for SG6 in CØ.
This time is stored in Special Purpose Timesetting no. 10.
SG6 is forced off after this maximum extension green time.
Signal Group 7
1.     Late start SG7 in CØ if going BØ ® CØ.
2.     SG7 is controlled by Special Movement Timesetting no. 3 in CØ.
CØ All Red timesetting is substituted for Special Movement Timesetting no. 3.
3.     XSF6 is used to set the maximum extension green time for SG7 in CØ.
This time is stored in Special Purpose Timesetting no. 9.
SG7 is forced off after this maximum extension green time.
Signal Group 8
1.     Late start SG8 in CØ if going BØ ® CØ.
2.     SG8 is controlled by Special Movement Timesetting no. 4 in CØ.
CØ All Red timesetting is substituted for Special Movement Timesetting no. 4.
3.     XSF5 is used to set the maximum extension green time for SG8 in CØ.
This time is stored in Special Purpose Timesetting no. 10.
SG8 is forced off after this maximum extension green time.
PEDESTRIAN GROUP OPERATION
Pedestrian 1
P1 calls AØ.
P1 can introduce at anytime in C2Ø and at the start of AØ and can overlap C2Ø ®
In Master, P1 can introduce at any time in AØ while XSF1 is set.
Pedestrian 2
P2 calls AØ.
P2 can introduce at anytime in C3Ø and at the start of AØ and can overlap C3Ø ®
In Master, P2 can introduce at any time in AØ while XSF2 is set.
Pedestrian 3
P3 calls BØ.
P3 can introduce at the start of BØ.
Pedestrian 4
P4 calls BØ.
P4 can introduce at the start of BØ.
DETECTOR OPERATION
General
Clear vehicle demands during associated phase green and yellow.
Detector 3
Clear demands for CØ from detector 3 during SG5 green and yellow.
Detector 6
Clear demands for CØ from detector 6 during SG6 green and yellow.
Detector 8
Clear demands for CØ from detector 8 during SG4 and SG8 green and yellow.
OPERATION OF “PREPARE TO STOP” SIGNS
1.    Relay Output 1 (P5WS/SO1) controls the operation of flashing alternating “PREPARE TO STOP”/BLANK sign.  (Note: BLANK refers to sign showing no display).
2.    Relay Output 1 (P5WS/SO1) is to be switched on at the start of AØ ECO if going AØ ® BØ,         ® C1Ø or AØ ® C2Ø.
3.    Relay Output 1 (P5WS/SO1) remains on until one of the following conditions is met:
·         Timer 1 (refer Special Purpose Timesetting no. 11) expires.  Timer 1 starts timing at the start of SG2 green. (Note: Timer 1 should be equal to or less than AØ minimum green.)
·         Detectors 4 & 5 become unoccupied for duration of Timer 2 (refer Special Purpose Timesetting no. 12) (gap time) during SG2 green.
CALCULATION OF AØ ECO
AØ ECO  = time to travel from the “Prepare to Stop” sign to the stop line (west approach)
- time to travel from the nominal stopping distance to the stop line (phase yellow)
+ reaction time (including the time to travel the viewing distance)
=  (120 m / 19.4 ms-1) - 4.5 s (AØ yellow) + 1.5 s
=  6.2 - 4.5 + 1.5 s
=  3.2 s  (ECO set to 4.0 s)
NOTE: if ECO were set at 3.5 s then motorists just missing the start of the flashing “Prepare to Stop” sign could still be faced with 2.7 s of yellow.  As a rule of thumb, to avoid confusion/indecision, ECO should be set such that motorists in the above situation are faced with less than half the phase yellow.