| GENERAL NOTES |
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| SUMMARY OF XSF FLAGS |
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| XSF1 |
- Allows the late
introduction of P1 in AØ (Master). |
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| XSF2 |
- Allows the late
introduction of P2 in AØ (Master). |
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| XSF5 |
- Selects Special
Maximum for SG5 and SG8 in CØ (Special Purpose Timesetting no. 9) |
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| (All modes). |
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| XSF6 |
- Selects Special
Maximum for SG6 and SG7 in CØ (Special Purpose Timesetting no. 10) |
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| (All modes). |
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| SIGNAL GROUP OPERATION |
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| Signal Group 5 |
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| 1. SG5 is controlled by Special Movement Timesetting no. 1 in CØ. |
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| CØ
All Red timesetting is substituted for Special Movement Timesetting no. 1. |
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| 2. XSF5 is used to set the maximum extension green time for SG5
in CØ. |
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| This
time is stored in Special Purpose Timesetting no. 9. |
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| SG5
is forced off after this maximum extension green time. |
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| Signal Group 6 |
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| 1. SG6 is controlled by Special Movement Timesetting no. 2 in CØ. |
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| CØ
All Red timesetting is substituted for Special Movement Timesetting no. 2. |
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| 2. XSF6 is used to set the maximum extension green time for SG6
in CØ. |
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| This
time is stored in Special Purpose Timesetting no. 10. |
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| SG6
is forced off after this maximum extension green time. |
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| Signal Group 7 |
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| 1. Late start SG7 in CØ if going BØ ® CØ. |
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| 2. SG7 is controlled by Special Movement Timesetting no. 3 in CØ. |
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| CØ
All Red timesetting is substituted for Special Movement Timesetting no. 3. |
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| 3. XSF6 is used to set the maximum extension green time for SG7
in CØ. |
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| This
time is stored in Special Purpose Timesetting no. 9. |
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| SG7
is forced off after this maximum extension green time. |
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| Signal Group 8 |
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| 1. Late start SG8 in CØ if going BØ ® CØ. |
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| 2. SG8 is controlled by Special Movement Timesetting no. 4 in CØ. |
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| CØ
All Red timesetting is substituted for Special Movement Timesetting no. 4. |
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| 3. XSF5 is used to set the maximum extension green time for SG8
in CØ. |
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| This
time is stored in Special Purpose Timesetting no. 10. |
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| SG8
is forced off after this maximum extension green time. |
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| PEDESTRIAN GROUP OPERATION |
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| Pedestrian 1 |
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| P1 calls AØ. |
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| P1 can introduce at anytime in C2Ø and at the start of AØ and can
overlap C2Ø ®AØ |
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| In Master, P1 can introduce at any time in AØ while XSF1 is set. |
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| Pedestrian 2 |
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| P2 calls AØ. |
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| P2 can introduce at anytime in C3Ø and at the start of AØ and can
overlap C3Ø ®AØ |
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| In Master, P2 can introduce at any time in AØ while XSF2 is set. |
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| Pedestrian 3 |
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| P3 calls BØ. |
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| P3 can introduce at the start of BØ. |
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| Pedestrian 4 |
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| P4 calls BØ. |
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| P4 can introduce at the start of BØ. |
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| DETECTOR OPERATION |
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| General |
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| Clear vehicle demands during associated phase green and yellow. |
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| Detector 3 |
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| Clear demands for CØ from detector 3 during SG5 green and yellow. |
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| Detector 6 |
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| Clear demands for CØ from detector 6 during SG6 green and yellow. |
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| Detector 8 |
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| Clear demands for CØ from detector 8 during SG4 and SG8 green and
yellow. |
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| OPERATION OF “PREPARE TO STOP” SIGNS |
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| 1. Relay Output 1 (P5WS/SO1) controls the operation of flashing
alternating “PREPARE TO STOP”/BLANK sign.
(Note: BLANK refers to sign showing no display). |
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| 2. Relay Output 1 (P5WS/SO1) is to be switched on at the start of
AØ ECO if going AØ ®
BØ, AØ ® C1Ø or AØ ® C2Ø. |
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| 3. Relay Output 1 (P5WS/SO1) remains on until one of the
following conditions is met: |
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| · Timer 1 (refer Special Purpose Timesetting no. 11)
expires. Timer 1 starts timing at the
start of SG2 green. (Note: Timer 1 should be equal to or less than AØ minimum
green.) |
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| · Detectors 4 & 5 become unoccupied for duration of Timer 2
(refer Special Purpose Timesetting no. 12) (gap time) during SG2 green. |
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| CALCULATION OF AØ ECO |
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| AØ ECO = |
time to travel from the
“Prepare to Stop” sign to the stop line (west approach) |
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- time
to travel from the nominal stopping distance to the stop line (phase yellow) |
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+
reaction time (including the time to travel the viewing distance) |
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= (120 m / 19.4 ms-1) - 4.5 s (AØ yellow) +
1.5 s |
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= 6.2 - 4.5 + 1.5 s |
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= 3.2 s
(ECO set to 4.0 s) |
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| NOTE: if ECO were set at 3.5 s then motorists
just missing the start of the flashing “Prepare to Stop” sign could still be
faced with 2.7 s of yellow. As a rule
of thumb, to avoid confusion/indecision, ECO should be set such that
motorists in the above situation are faced with less than half the phase
yellow. |
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