START UP
At START UP the controller goes immediately to Bφ and extends Bφ to maximum
GENERAL NOTES
1 Controller can rest in either Bφ or Dφ.
2 Phase Change Priority
For each phase, the following table describes the priority order for servicing any demanded phases:
     
CURRENT PHASE PRIORITY COMMENTS
     
1. Bφ  Unconditional (i.e. Controller must go to Bφ after Aφ)
     
1. CTO Phase Controller will go Bφ -> CTO Phase immediately, provided Bφ minimum has expired
     
  2. Cφ  If the controller is going Bφ -> Cφ then Bφ must extend to at least the maximum extension green
     
  3. Aφ Controller will go Bφ -> Aφ immediately, provided Bφ minimum has expired
     
1. Dφ  Unconditional (i.e. Controller must go to Dφ after Cφ)
     
1. CTO Phase Controller will go Dφ -> CTO Phase immediately, provided Dφ minimum has expired
     
  2. Aφ If the controller is going Dφ -> Aφ then Dφ must extend to at least the maximum extension green
     
  3. Cφ Controller will go Dφ -> Cφ immediately, provided Dφ minimum has expired
     
CTO Phase Aφ or Cφ (Dependent on previous operating phase before CTO phase) C        If the previous phase (before going to the CTO phase) was Bφ, then the controller must go to Cφ.
    C        If the previous phase (before going to the CTO phase) was Dφ, then the controller must go to Aφ.
OPERATION OF DETECTOR 4 - PERMANENT DEMAND FOR A PHASE AND C PHASE
The operation of Detector 4 is summarized in the table below:
   
DETECTOR 4 POSITION OPERATION
   
SHORT CIRCUIT A permanent demand is placed for Aφ and Cφ
   
NORMAL Normal Operation
CONTROL TAKE OVER PHASE (B PHASE)
The CONTROL TAKE OVER (CTO) PHASE (i.e. Bφ) is controlled by a 2 position switch in the Telstra Hatch of the controller. This switch is connected to Detector Input 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
C        If the controller is in Aφ when the CTO phase is demanded Aφ is first allowed to gap out or extend to maximum before going to the CTO phase. (Note: The controller actually goes through Bφ to get to the CTO Phase). 
C        If the controller is in Cφ when the CTO phase is demanded Cφ is first allowed to gap out or extend to maximum before going to the CTO phase. (Note: The controller actually goes through Dφ to get to the CTO Phase). 
C        If the controller is in Bφ when the CTO phase is demanded then remain in Bφ (which becomes the CTO phase)
C        If the controller is in Dφ when the CTO phase is demanded then Dφ is allowed to run its minimum before going to the CTO phase
C        The CTO Phase operates for at least the time specified in Special Purpose Timesetting No. 13
OPERATION DURING FLEXILINK PLANS
During the period that FLEXILINK Plan 1 or 2 is scheduled, substitute Special Purpose Timesettings for Aφ and Cφ Maximum Extension Greens as per the following table:
     
FLEXILINK PLAN Aφ Maximum Extension Green Cφ Maximum Extension Green
     
1 Special Purpose Timesetting No. 9 Special Purpose Timesetting No. 10
     
2 Special Purpose Timesetting No. 11 Special Purpose Timesetting No. 12
 (Note: The changes described above occur even when the controller is operating in Masterlink or Isolated mode and FLEXILINK Plan 1 or 2 is set in the Abackground@ via FLEXILINK Schedules.)
FLEXILINK SCHEDULES
The FLEXILINK Schedules shown on page 12 operate the FLEXILINK Plan(s)
CALCULATION OF B PHASE AND D PHASE TIMESETTINGS
Bφ and Dφ are the Aall red@ phases which are used to clear traffic across the bridge after the particular vehicle group has operated.
The following calculation is carried out in order to find the clearance time across the bridge:
Distance across the bridge from stopline to stopline: 195 metres
Assumed speed across the bridge: 40 km/hr (11.11 m/sec)
Clearance Time Required: 18 seconds
From the calculated Clearance Time (see above) the timesettings for Bφ and Dφ are determined as shown below:
   
Timesetting Time (seconds)
   
Aφ All Red or 2
Cφ All Red  
   
Bφ Minimum Green or 3
Dφ Minimum Green  
   
Bφ Maximum Extension Green or 10
Dφ Maximum Extension Green  
   
Bφ Yellow or 3
Dφ Yellow  
   
Total Clearance Time 18