GENERAL NOTES
SUMMARY OF XSF FLAGS
GENERAL OPERATION
1 At start up the controller goes immediately to BØ and extends to maximum.
2 Controller can rest in either BØ or DØ.
PHASE OPERATION
PHASE CHANGE PRIORITY
CURRENT   PHASE PRIORITY                                        COMMENTS
         1. BØ Unconditional (i.e. Controller must go to BØ after AØ)
  1. CTO Phase Controller will go BØ ® CTO phase immediately, provided BØ minimum has expired.
 
         2. CØ If the controller is going BØ ® CØ then BØ must extend to at least the maximum extension green.
 
  3. AØ Controller will go BØ ® AØ immediately, provided BØ minimum has expired.
 
        1. DØ Unconditional (i.e. Controller must go to DØ after CØ)
     1. CTO Phase Controller will go DØ ® CTO phase immediately, provided DØ minimum has expired.
       
  2. AØ If the controller is going DØ ®AØ then DØ must extend to at least the maximum extension green.
 
  3. CØ Controller will go DØ ® CØ immediately, provided DØ minimum has expired.
 
CTO Phase AØ or CØ (Dependent on previous operating phase before CTO phase) ·                    If the previous phase (before going to the CTO phase) was BØ, then the controller must go to CØ.
·                    If the previous phase (before going to the CTO phase) was DØ, then the controller must go to AØ.
 
CONTROL TAKE OVER PHASE (B PHASE)
The CONTROL TAKE OVER (CTO) PHASE (i.e. BØ) is controlled by a 2 position switch in the Telstra Hatch of controller (If provided). This switch is connected to Detector No.3.
The operation of the switch is summarized in the table below:
SWITCH POSITION DETECTOR 3 POSITION OPERATION
            ON SHORT CIRCUIT CTO phase is demanded and extended for as long as the switch is in the ON position
           OFF NORMAL Normal operation
OPERATION WHEN CTO PHASE IS DEMANDED
For each phase, the following table describes the priority for servicing any demanded phases:
If the controller is in AØ when the CTO phase is demanded AØ is first allowed to gap out or extend to maximum before going to the CTO phase. (Note. The controller actually goes through BØ to get to the CTO phase).
If the controller is in CØ when the CTO phase is demanded CØ is first allowed to gap out or extend to maximum before going to the CTO phase. (Note. The controller actually goes through DØ to get to the CTO phase).
If the controller is in BØ when the CTO phase is demanded  then remain in BØ (which becomes the CTO phase)
If the controller is in DØ when the CTO phase is demanded  then DØ is allowed to run its minimum  before going to CTO phase
The CTO phase operates for at least the time specified in Special Purpose Timesetting No.13.
DETECTOR OPERATION
Detector 4
Detector 4 position OPERATION
SHORT CIRCUIT A permanent demand is placed for AØ and CØ.
NORMAL Normal Operation
CALCULATION OF BØ AND DØ ALL RED TIMES
BØ and DØ are the ‘all red’ phases which are used to clear traffic across the bridge after a vehicle phase.
The clearance time required: 131metre/11.11m/sec (40km/hr) = 11.79 (say 12).
BØ and DØ minimum green = Clearance time - AØ or CØ all red - BØ or DØ yellow.
                                              = 12-2-3 = 7 seconds.
OPERATION DURING FLEXILINK PLANS
During the period that Flexilink plans operate, substitute Special Purpose Timesetting for AØ and CØ maximum extension green as outlined in the table below:
FLEXILINK PLAN AØ Maximum Extension Green CØ Maximum Extension Green
1 Special Time Setting No.9 Special Time Setting No.10
2 Special Time Setting No.11 Special Time Setting No.12
Example plan 1 data PD1CL = 0, PD1Y- = C
Example plan 2 data PD2CL = 0, PD2Y- = C