VISSIM 5.30-05 User Manual

8.2.3.2 Green Time Statistics (*.AGZ)
Test of Signal Control without Traffic Simulation
VISSIM generates a green time distribution with and without preemption
event for all signal groups (phases) specified in the demand file *.BEL.
VISSIM also calculates green time requirement and volume to capacity ratio
for all signal groups (phases) according to the specified volume demand.
To get the green time statistics follow the steps outlined below:
1. Use an external text editor (e.g. Notepad) to create a demand file (*.BEL,
see example below) and set parameters accordingly. A demand file is
required for comparing actual and necessary green times and has the
following structure:
-- Intersection Demand File for VISSIM/Test/Loop
-- 185p98s4.BEL
LSA 1 -- controller #
ASL 1 -- # of nested loops
BELASTUNG 12 -- preempting vehicles per hour
-- signal phase #/ demand [veh/h] / base green time [sec]:
SGP 1 BELASTUNG 100 SAETTIGUNG 1770 BASISGRUEN 8
SGP 2 BELASTUNG 1390 SAETTIGUNG 3725 BASISGRUEN 55
SGP 3 BELASTUNG 185 SAETTIGUNG 1770 BASISGRUEN 15
SGP 4 BELASTUNG 915 SAETTIGUNG 5471 BASISGRUEN 25
SGP 5 BELASTUNG 170 SAETTIGUNG 1770 BASISGRUEN 16
SGP 6 BELASTUNG 1125 SAETTIGUNG 3725 BASISGRUEN 49
SGP 8 BELASTUNG 845 SAETTIGUNG 3686 BASISGRUEN 42
2. Generate the green time statistics file with the extension *.AGZ via TEST -
LOOP – ANALYZE – GREEN TIME STATISTICS. Use the previously generated
loop output file *.SLO. It will have the following content:
Signal group 1:
Average green time:
- without modification = 8.0 s (100.0%)
- modified by public transport = 14.5 s (181.2%)
- weighted average = 10.6 s (132.5%)
Capacity:
- saturation flow = 1770 veh/h
- public transport modifications = 12 veh/h
- flow = 100 veh/h
- capacity = 156 veh/h
- degree of saturation = 0.64
Required green time = 6.8 s
Distribution of green times:
13 1 *
14 7 *******
15 0
16 0
17 2 **
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