VISSIM 5.30-05 User Manual

The 3D Graphics Mode
With a fixed time signal control,
countdown timers show the
currently remaining red and
green times of a signal group
during the cycle.
If required, they can also be
used in combination with signals
of any vehicle type if desired.
They are activated as soon as
they are linked to a signal group
(as with all other 3D signals).
These are the characteristics of
the timers:
- The timer is colored “red”
during signal group states
“red” and “red/amber”.
- The timer is colored “green”
during signal group state
"green" (and not e.g. during
"green flashing").
- For all other signal group
states (e.g. “amber”, “red
flashing”, “amber flashing” or
“green flashing”) the timer
remains off (dark).
- The displayed red and green timings (timer start values) are taken
from the last red and the last green period of the signal group
respectively (where red/amber belongs to red in this context). I.e., the
timer always starts with the value of the last duration of the
corresponding state. If that duration was 0 then no timer is displayed.
- Timers do not function properly if there are more than one red or
green time period within the same cycle (because the counters will
still show the timings of the last green or red period).
Note that due to the “history” behaviour, timers may display no or incorrect
values during the first and possibly second signal cycle after simulation
start, and also during the first and possibly second signal cycle after any
change of signal program.
Timers are intended for fixed time signals only.
If they are used with vehicle-actuated signal controls, the timers will display
incorrect timings due to the unpredictable red and green times.
User Manual © PTV AG 2011 93