| GENERAL NOTES | |||||||||||||||||||||||||||||
| SUMMARY OF XSF FLAGS | |||||||||||||||||||||||||||||
| (Communications Operation of XSF flags is required) | |||||||||||||||||||||||||||||
| XSF1 | - | Allows for automatic introduction of P1. | |||||||||||||||||||||||||||
| XSF7 | - | Inhibits special operation functions of queue detector 7. | |||||||||||||||||||||||||||
| XSF8 | - | Inhibits special operation functions of queue detector 8. | |||||||||||||||||||||||||||
| GENERAL OPERATION | |||||||||||||||||||||||||||||
| · If in AØ, clear demands for CØ. | |||||||||||||||||||||||||||||
| · Late start SG9 in CØ if transitioning from BØ -> CØ. | |||||||||||||||||||||||||||||
| · Clear demands for BØ via detector 5 during CØ green and yellow. | |||||||||||||||||||||||||||||
| SIGNAL GROUP OPERATION | |||||||||||||||||||||||||||||
| Signal Group 5 | |||||||||||||||||||||||||||||
| Signal Group 5 is a 3-aspect (R/Y/G) partially controlled lantern display. The red right turn arrow normally remains “blank” throughout AØ, BØ and CØ. | |||||||||||||||||||||||||||||
| However, the operation of Signal Group 5 red is affected by queues on Detector 7 - refer to notes headed “SPECIAL OPERATION – QUEUE DETECTOR 7 & SIGNAL GROUP 5” (Page 4/2). | |||||||||||||||||||||||||||||
| PEDESTRIAN GROUP OPERATION | |||||||||||||||||||||||||||||
| Pedestrian 1 | |||||||||||||||||||||||||||||
| P1 demands AØ. | |||||||||||||||||||||||||||||
| P1 can introduce at the start of AØ. | |||||||||||||||||||||||||||||
| P1 can introduce anytime in CØ and at the start of AØ and can overlap from CØ -> AØ. | |||||||||||||||||||||||||||||
| P1 can auto introduce at the start of SG1 when XSF1 is set. | |||||||||||||||||||||||||||||
| Pedestrian 2 | |||||||||||||||||||||||||||||
| P2 demands AØ. | |||||||||||||||||||||||||||||
| P2 can introduce at the start of AØ. | |||||||||||||||||||||||||||||
| Pedestrian 3 | |||||||||||||||||||||||||||||
| P3 demands BØ. | |||||||||||||||||||||||||||||
| · P3 can introduce at the start of BØ. | |||||||||||||||||||||||||||||
| SPECIAL OPERATION – QUEUE DETECTOR 7 & SIGNAL GROUP 5 | |||||||||||||||||||||||||||||
| Detector 7 is designed to detect queues extending back along Colman Street towards this intersection from the railway crossing near Drouin-Warragul Road. When detector 7’s presence time expires, the intersection operation is altered as described below: | |||||||||||||||||||||||||||||
| Queue Detected (Detector 7 Presence Time Expired): | |||||||||||||||||||||||||||||
| If a queue is detected, then inhibit the introduction of CØ, P1 and P2. | |||||||||||||||||||||||||||||
| If a queue is detected during AØ green, then terminate AØ immediately (without violating minimum green and pedestrian times) and proceed to BØ. | |||||||||||||||||||||||||||||
| If a queue is detected during CØ green, then terminate CØ immediately (without violating minimum green times) and proceed to AØ. | |||||||||||||||||||||||||||||
| BØ operation remains unaltered when a queue is detected. | |||||||||||||||||||||||||||||
| MSS1 flag is set from the point at which the queue is detected until the start of BØ, and in linked mode the controller will change to isolated operation throughout this period. When “on-line” to the SCATS regional computer this is achieved via the MSS1 flag using a Variation Parameter Table (VR30). | |||||||||||||||||||||||||||||
| Signal Group 5 – Special Operation | |||||||||||||||||||||||||||||
| If a queue is detected during AØ green or yellow, SG5 will be set to red at the start of AØ red. | |||||||||||||||||||||||||||||
| If a queue is detected during AØ red or at any time during BØ, SG5 will be set red immediately. | |||||||||||||||||||||||||||||
| If a queue is detected during CØ green or yellow, SG5 will be set to red at the start of CØ red. | |||||||||||||||||||||||||||||
| If a queue is detected during CØ red, SG5 will be set red immediately. | |||||||||||||||||||||||||||||
| In the above cases, SG5 will then remain red for at least the time specified in Special Purpose Timesetting No. 9. | |||||||||||||||||||||||||||||
| When AØ next commences: | |||||||||||||||||||||||||||||
| - If detector 7 has been continuously occupied since its presence timer expired, then SG 5 will be held red for the duration of AØ (even if detector 7 then becomes unoccupied during AØ). | |||||||||||||||||||||||||||||
| - If detector 7 presence time is no longer expired, then SG5 will be free to resume normal operation, i.e., will be switched “blank” from the start of AØ, provided that its minimum displayed red time has expired. | |||||||||||||||||||||||||||||
| Note that a demand for BØ will be placed if SG5 has been held red at the start of AØ in either of the above instances. If detector 7 becomes unoccupied during BØ or CØ, then SG5 will be free to resume normal operation from the start of AØ as above. | |||||||||||||||||||||||||||||
| Other Conditions: | |||||||||||||||||||||||||||||
| If detector 7 is on continuously for the time specified in Special Purpose Timesetting No.10, then MSS2 flag will be set. MSS2 can be used to send a SCATS warning message. | |||||||||||||||||||||||||||||
| MSS7 will be set whenever detector 7’s presence time is expired. | |||||||||||||||||||||||||||||
| If XSF7 is set, or if detector 7 alarms, then inhibit detector 7 from invoking the special operating conditions described above. | |||||||||||||||||||||||||||||
| SPECIAL OPERATION – QUEUE DETECTOR 8 | |||||||||||||||||||||||||||||
| Detector 8 is designed to detect queues extending back along Colman Street from this intersection towards the railway crossing near Drouin-Warragul Road. When detector 8’s presence time expires, the intersection operation is altered as described below: | |||||||||||||||||||||||||||||
| Queue Detected (Detector 8 Presence Time Expired): | |||||||||||||||||||||||||||||
| If a queue is detected, then inhibit the introduction of CØ, P1 and P2. | |||||||||||||||||||||||||||||
| If a queue is detected during AØ green, then terminate AØ immediately (without violating minimum green and pedestrian times) and proceed to BØ, where detector 8 will then be able to extend BØ in that cycle (Note that detector 8 does not extend BØ in normal operation). | |||||||||||||||||||||||||||||
| If a queue is detected during CØ green, then terminate CØ immediately (without violating minimum green times) and proceed to AØ. | |||||||||||||||||||||||||||||
| MSS3 flag is set from the point at which the queue is detected until detector 8 is no longer occupied, and in linked mode the controller will change to isolated operation throughout this period. When “on-line” to the SCATS regional computer this is achieved via the MSS3 flag using a Variation Parameter Table (VR30). | |||||||||||||||||||||||||||||
| Other Conditions: | |||||||||||||||||||||||||||||
| If detector 8 is on continuously for the time specified in Special Purpose Timesetting No.11, then MSS4 flag will be set. MSS4 can be used to send a SCATS warning message. | |||||||||||||||||||||||||||||
| MSS8 will be set whenever detector 8 presence time is expired. | |||||||||||||||||||||||||||||
| If XSF8 is set, or if detector 8 alarms, then inhibit detector 8 from invoking the special operating conditions described above. | |||||||||||||||||||||||||||||