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