| GENERAL NOTES |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| START UP |
|
|
|
|
|
| At START UP the controller goes immediately to BØ and extends BØ
to maximum. |
|
|
|
|
|
|
|
| GENERAL NOTES |
|
|
|
|
|
| 1.
Controller can rest in either BØ or DØ. |
|
|
| 2.
Phase Change Priority. |
|
|
|
|
|
| For each phase, the follow table describes the priority order for
servicing any demand phases: |
|
|
|
|
| Current Phase |
Priority |
Comments |
|
|
| AØ |
1. BØ |
Unconditional (i.e. Controller must go to BØ after AØ). |
|
|
| BØ |
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 least the maximum
extension green. |
|
|
| 3. AØ |
Controller will
go BØ -> AØ immediately, provided BØ minimum has expired. |
|
|
| CØ |
1. DØ |
Unconditional (i.e. Controller must go to DØ after CØ). |
|
|
| DØ |
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. |
|
|
| |
|
|
|
|
|
| OPERATION OF DETECTOR 4 – PERMANENT DEMAND FOR A PHASE AND C
PHASE. |
|
|
|
|
| The operation of Detector 4 is summarised in the table below: |
|
|
|
|
| Detector 4 Position |
Operation |
|
|
| SHORT CIRCUIT |
A permanent
demand is placed for AØ and CØ. |
|
|
| NORMAL |
Normal Operation |
|
|
|
|
|
|
|
|
|
|
| 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 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 |
|
|
|
|
|
| If the controller is in AØ when 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 CTO phase is demand then remain in
BØ (which becomes the CTO phase). |
|
| If the controller is in DØ when CTO phase is demand then remain in
DØ (which becomes the CTO phase). |
|
| 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 Timesetting for AӨ and CӨ Maximum
Extension Greens as per the following table |
|
|
|
|
| Flexilink Plan |
AØ Maximum Ext
Green |
CØ Maximum Ext
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 “background” via Flexilink Schedule |
|
|
|
|
| FLEXILINK SCHEDULES |
|
|
|
|
|
| The FLEXILINK schedules shown on page 12 operate the Flexilink
Plan(s) |
|
|
|
|
|
|
| CALCULATION OF B PHASE AND D PHASE TIMESETTINGS |
|
|
|
|
| BØ and DØ are the “all 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: 270 meters |
|
|
|
|
|
Assumed
speed across the bridge: |
15Km/hr (4.16 meters / Second) |
|
|
|
|
|
Clearance
Time Required: |
|
65 seconds |
|
|
|
|
| From the calculate Clearance Time (See above) the Timesetting for
BØ and DØ are determined as shown below: |
|
|
|
|
| Timesetting |
Time (seconds) |
|
|
| AØ All Red or CØ All
Red |
2 |
|
|
| BØ Minimum Green or DØ Minimum Green |
4 |
|
|
| BØ Maximum Extension Green or DØ Maximum Extension Green |
56 |
|
|
| BØ Yellow or DØ Yellow |
3 |
|
|
| Total Clearance Time |
65 |
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|