Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 11 Page 263 of 265
Since phase F is configured as a left-turn green filter arrow, it remains at green until
its associated phase, i.e. phase E, appears at green even though its minimum green
time is set to zero and stage 4 finished several seconds earlier.
This move has allowed the controller to:
 Terminate the pedestrian phase G when its minimum green time expires,
allowing the left-turn green filter arrow on as soon as possible.
While still allowing the controller to:
 Terminate phases A and B when a gap appears to allow the main green of
phase E (as well as phases C and H) to appear as soon as possible.