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GENERAL
NOTES |
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| SIGNAL GROUP OPERATION |
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| Signal Group 2 |
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| 1.
SG2 has an ECO period when transitioning from AØ
to any other phase. |
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| 2.
When transitioning from AØ → DØ, close down
SG1 together with SG3, then re-introduce SG1 at the end of DØ late start
period. |
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| 3.
When transitioning from CØ → AØ, introduce
SG2 at the start of CØ all-red period. |
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| 4.
When transitioning from DØ → AØ, introduce
SG2 at the start of DØ all-red period. |
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| PEDESTRIAN GROUP OPERATION |
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| Pedestrian 1 |
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| 1.
P1 calls AØ. |
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| 2.
P1 can introduce any time in DØ and at the start
of AØ and can overlap from DØ → AØ. |
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| Pedestrian 2 |
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| 1.
P2 calls AØ. |
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| 2.
P2 can introduce at the start of AØ. |
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| Pedestrian 3 |
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| 1.
P3 calls CØ. |
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| 2.
P3 can introduce at the start of CØ. |
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| Pedestrian 4 |
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| 1.
P4 calls CØ. |
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| 2.
P4 can introduce at the start of CØ. |
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| DETECTOR OPERATION |
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| General |
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| 1.
Clear vehicle demands during associated phase
green and yellow. |
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| Detector 3 |
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| 1.
Detector 3 places non-locking calls for DØ when
its presence timer expires. |
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| 2.
Clear demands for DØ from detector 3 during SG5
green and yellow. |
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| Detector 5 |
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| 1.
Detector 5 places non-locking calls for BØ when
its presence timer expires. |
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| 2.
Clear demands for BØ from detector 5 during SG6
green and yellow. |
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| Detector 8 and 9 |
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| 1.
Detector 8 and 9 are cyclist push buttons |
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| 2.
Activation of detector 8 and/or detector 9 adds
the increment to CØ minimum green. |
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| NOTES ON OPERATION IN TRAIN PHASE |
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| RAIL LINK NOTES |
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| CONTROLLER INTERFACE INFROMATION |
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| “CABLE MONITOR” (CONTINUITY) INPUT |
Via Detector 17 |
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| “RELEASE/FORCE” |
(RF) INPUT |
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Via Detector 18 |
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| “CALL” INPUT |
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Via Detector 19 |
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| “BOOMS HORIZONTAL” INPUT |
Via Detector 20 |
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| “TRAFFIC LIGHT RESPONSE” (TLR) INPUT |
Via Signal Group 12 |
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| RAIL LINK
OPERATION |
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| 1. On the receipt of the “CALL” input the
controller will terminate the running phase (without violating minimum green
or pedestrian times) and proceed to the phase shown in the following phase
transitions which is dependent upon which phase is running at the time of the
“CALL”. |
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| i.
If in AØ, then go to BØ then E2Ø |
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| ii.
If in BØ, then go to E2Ø |
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| iii.
If in CØ, then go to E2Ø |
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| iv.
If in DØ, then go to E1Ø |
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| 2. If the controller is changing phases when
the “CALL” is received then do NOT service the pedestrians in the phase which
is about to run. |
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| 3. The controller
provides phase status information to the Railway Authority in the form of a
“TRAFFIC LIGHT RESPONSE” (TLR) output. The FLASHING YELLOW response to the RF
input is suspended during the period that the TLR output is activated. The
TLR output is commenced at the start of the train phase green period or at
the start of BØ intergreen, whichever occurs sooner. The TLR output is
terminated when the “BOOMS HORIZONTAL” input terminates. At this point, the
TLR output changes from “green” to “yellow”. It then changes to “red” when
the “RF” input is reinstated. |
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| 4. Although 35 seconds at
least should elapse between receipt of the “CALL” input and the termination
of the “RF” input, there may be occasions when the “RF” input is terminated
prior to the activation of the TLR output. This will force a FLASHING YELLOW
response and generate the ABNORMAL CONDITION message No. 1. |
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| 5. Termination of the “BOOMS HORIZONTAL”
input initiates a pre-release sequence which directs the controller to
terminate all signal groups in the train phase without violating pedestrian
or minimum green times. The controller will stay in this “train phase ALL-RED
status” until the “RF” input is reinstated, thus allowing the controller to
resume normal vehicle operation. |
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| If the “RF” input is not
reinstated before the expiry of the timesetting in Special Purpose
Timesetting No. 16, then the controller will generate the ABNORMAL CONDITION
message No. 2 and go to FLASHING YELLOW until the “RF” input is reinstated.
This timer begins to count down upon termination of the “BOOMS HORIZONTAL”
input. |
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| 6. After the termination
of the “BOOMS HORIZONTAL” input, if a second “CALL” is received PRIOR to the
controller being in the train phase intergreen period (i.e. the booms have
moved off the horizontal) it will proceed to BØ. If a second “CALL” is received
DURING the train phase intergreen period, then the controller will service
the next vehicle phase, i.e. AØ, with no pedestrian introduction for the
minimum green time only before going back into BØ and then into the train
phase again. |
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| FAULT CONDITIONS |
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| a. If the “RF” input is terminated without a
previous “CALL” input, the controller will generate the ABNORMAL CONDITION
message No. 3 and go to FLASHING YELLOW until the “RF” input is reinstated
afterwhich it will go through an ALL-RED start-up sequence, then resume
normal operation. |
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| b. If there is a break in the “CABLE MONITOR”
input, the controller will generate an ABNORMAL CONDITION message No. 4 and
go to FLASHING YELLOW indefinitely. When this input is restored, the
controller will go through an ALL-RED start-up sequence, then resume normal
operation. |
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| SPECIAL CONDITIONS |
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| 1. When a “CALL” input terminates in the
presence of the “RF” input a timer will begin to count down from Special
Purpose Timesetting No. 15. Any further “CALL” inputs will reset the timer,
If the “RF” is not terminated prior to expiry of the timer, then the
controller will resume normal vehicle operation. |
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| 2. When the “CALL” input
is received MSS1 flag will be set. This will stay on until the end of AØ
green. During this time the MSS1 flag will instruct (via VP table) the
controller to be forced to ISOLATED OPERATION. The first time AØ runs after
the train phase, select Special Purpose Timesetting No. 17 for AØ maximum
extension. |
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| 3. Flexilink operation can be run at this
site. |
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| 4. When in EØ |
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| a.
Controller can transition between E1Ø, E2Ø and
E3Ø, depending on demand. |
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| b.
P1 can introduce at the start of E3Ø. |
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| c.
P2 can introduce at the start of E3Ø. |
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| d.
P3 can introduce at the start of E1Ø, E2Ø and E3Ø
and overlap between the sub phases. |
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| e.
P4 can introduce at the start of E2Ø or E3Ø. |
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| f.
Detectors 1 and 3 call and extend E1Ø. |
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| g.
Detectors 6, 7, 8 and 9 to call E2Ø, while
detectors 6 and 7 also extend E2Ø. |
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| h.
P1 and P2 call E3Ø. |
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| i.
P3 and P4 call E2Ø |
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| ABNORMAL CONDITION MESSAGES |
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| a)
Message No. 1 via MSS2 |
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| “RF terminated before activation of TLR” |
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| b)
Message No. 2 via MSS3 |
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| “RF not received after pre-release” |
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| c)
Message No. 3 via MSS4 |
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| “RF terminated without a call” |
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| d)
Message No. 4 via MSS5 |
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| “Break in cable monitor” |
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