GENERAL NOTES
GENERAL OPERATION
·               This controller will operate the intersection with no green output to Goulburn Valley Highway, AØ.
·               AØ green will only be shown inside the controller.
·               Goulburn Valley Highway red is displayed by TWO alternating red displays driven from a flasher.
·               Ambulance Phase (BØ) can be demanded by either northbound button (Detector 1) or southbound button (Detector 2).
·               When ambulance phase (BØ) is demanded, AØ will be shut down provided its minimum green has expired.
·               There is no display for BØ (Ambulance phase) except inside the controller.
·               BØ has a minimum green period and an extension green period.
·               If cancelling button (Detector 3) is not activated during BØ, allow BØ to extend to maximum before termination.
·               BØ can be terminated at any time during its extension period if delay timer for Detector 3 expires.
·               Set MSS1 when BØ is first demanded. MSS1 is set for the whole duration of BØ.
·               This controller will start-up in AØ and will not place any start-up demand for BØ.
Note: Northbound button, southbound button and cancelling button are located within the Ambulance Station.
DETECTOR OPERATION
Detector 1 (northbound button):
·               When activated (Off to On state), starts Timer 1.
Timer 1 (Special Purpose Timesetting No. 9) expires, place a demand for BØ.
·               If this detector is stuck in On state, do not place further demand for BØ.
Detector 2 (southbound button):
·               When activated (Off to On state), Starts Timer 2.
Timer 2 (Special Purpose Timesetting No. 10) expires, place a demand for BØ and set MSS2 for the duration as shown in Special Purpose Timesetting No. 22.
·               If this detector is stuck in On state, do not place further demand for BØ and do not set MSS2.
Detector 3 (cancelling button):
·               When activated (Off to On state), start Timer 3 (Special Purpose Timesetting No. 11).
Timer 3 expires, terminate BØ extension green.
·               If this detector is stuck in On state, do not terminate BØ extension green.