GENERAL NOTES
GENERAL OPERATION
1. Use AØ yellow for CØ yellow if going CØ®BØ.
2. In Flexi, Y+ must be set to run the alternate sequence ACB.
SIGNAL GROUP OPERATION
Signal Group 4
1. SG4 operates green-yellow-red in CØ.
2. SG4 goes red with SG2 in AØ, and remains red through BØ.
3. SG4 closes down at the end of CØ green, remains red through BØ, if going CØ®BØ, and AØ late 
    start, then goes ‘blank’ at the start of AØ minimum green.
When P1 is demanded.
4. If going BØ®AØ, with a demand for P1, hold SG4 red for the duration of Timer 1 (Special Purpose 
    Timesetting no. 9). Timer 1 starts timing at the start of P1 walk. When Timer 1 expires, SG4 red is 
    switched off.
5. If going CØ®AØ, with a demand for P1, SG4 goes red at the start of CØ all red period, and is held 
    red for the duration of Timer 1 (Special Purpose Timesetting no. 9). Timer 1 starts timing at the 
    start of P1 Walk. When Timer 1 expires, SG4 red is switched off. 
6. AØ ECO is used to guarantee SG4 minimum blank period.  Timer 2 (Special Purpose Timesetting 
    no. 10) starts timing at the start of SG4 blank period. When Timer 2 expires, expire AØ ECO.
Signal Group 5
1. Late start SG5 in BØ if going AØ®BØ.
PEDESTRIAN GROUP OPERATION
Pedestrian 1 
P1 calls AØ.
P1 calls BØ if the controller is resting in AØ.
P1 can introduce at the start of AØ.
Pedestrian 2
P2 calls BØ.
P2 can introduce at the start of BØ.
DETECTOR OPERATION
General
Clear vehicle demands during associated phase green and yellow.
Detector 4
Detector 4 places a non-locking call for CØ when its presence time expires.
Clear demands for CØ from detector 4 during SG4 green and yellow.
Detector 6
Clear demands for BØ from detector 6 during SG3 and SG6 green and yellow.