Saving discharge record to a file

The discharge record shows the time intervals between vehicles driving away from signal heads. You can use it for purposes such as determining time needs for your signal controller or calibrating actual measured saturation flow values. Links, vehicle inputs and signal heads must be defined in the network.

In order to determine meaningful time needs, the measured flows should be saturated. You should therefore ensure that the number of vehicles queued behind the stop line is at least as many as can pass during a green phase.

You can output the following data and data formats:

Output

ASCII file

MDB file

Attribute file from attribute list

Aggregated data

-

-

 -

Raw data

*.dis

-

-
Defining evaluation of the discharge record results

1.  Make sure that the attribute Discharge record active is selected in the attributes of the desired signal head.

2.  From the Evaluation menu, choose > Configuration > Direct Output tab.

3.  In the Discharge record row, select the option Write to file.

4.  You can change the time if you wish (Using the Direct output function to save evaluation results to files).

5.  Confirm with OK.

6.  Start the simulation (Running a simulation).

A *.dis file is saved. If the file was created based on the simulation of a scenario, the file name contains the name of the scenario.

Result of discharge record evaluation

A *.dis discharge record may contain the following data:

Element

Description

File

Path and name of network file

Comment

Optional comment from the simulation parameters

Date

Time of evaluation

PTV Vissim

Version number, service pack number, build number
Table

Discharge at signal controller with its number, signal group with its number, and in parentheses data collection point with number

Data block

One line for each signal controller cycle

  • Column 1: Simulation seconds at start of green time. If a red-amber time > 0 is defined at the signal group, this counts as green time.
  • Column 2: Time difference between start of green time (beginning of red-amber) and arrival of first vehicle at measuring point
  • Column 3: Time need: time gap between the front end of vehicle 1 (the first vehicle in the queue) and the front end of vehicle 2
  • All other columns contain the time needs of all subsequent vehicles according to their positions in the queue.
  • The end of the green phase is shown by the position of the parentheses. The numbers in parentheses show:
  • the number of vehicles passing the measuring point during the green phase
  • the average time needs of these vehicles. Both values are determined without taking vehicle 1 into account, because its time needs depend on the distance between the stop line and the measuring point.
  • Values after the parentheses were measured for vehicles that crossed the stop line after the green phase (during yellow or red).
  • Fourth-to-last line: vehicle position number in the queue (index number) for each cycle
  • Third-to-last line: average time need for the vehicle position concerned
  • Next-to-last line: measured number of vehicles at this position. If saturation is not present for some green phases, smaller numbers are measured for higher index numbers.
  • Last line: total number of vehicles (except those in the first position) and their time needs (measured over all cycles).
Discharge record example: file *.dis
 
Discharge record
File:    C:\Users\Public\Documents\PTV Vision\PTV Vissim 2022\Examples Demo\3D - Complex Intersection Karlsruhe.DE\Karlsruhe 3D.inpx
Comment:  Karlsruhe 3D example
Date:    03.01.2023 10:20:30
PTV Vissim 2022.00-00* [238187]
Discharge at SC 619, signal group 14, signal head 3
1   (0: 0.0)
80   1.11   1.16   (1: 1.16)
170   1.01   (0: 0.0)
260   (0: 0.0)
350   0.95   0.70   (1: 0.70)
440   1.07   1.31   (1: 1.31)
530   1.09   (0: 0.0)
620   1.05   (0: 0.0)
710   1.17   (0: 0.0)
800   1.15   1.45   (1: 1.45)
890   1.09   (0: 0.0)
980   1.11   (0: 0.0)
1070   (0: 0.0)
1160   0.99   0.25   0.88   (2: 0.56)
1250   (0: 0.0)
1340   1.07   (0: 0.0)
1430   (0: 0.0)
1520   6.95   (0: 0.0)
1610   1.18   1.35   (1: 1.35)
1700   1.18   0.98   (1: 0.98)
1790   1.07   (0: 0.0)
1880   1.06   0.05   1.00   0.11   1.05   1.18   (5: 0.68)
1970   1.11   (0: 0.0)
2060   1.06   1.09   (1: 1.09)
2150   1.08   (0: 0.0)
2240   1.10   1.10   1.08   3.49   (3: 1.89)
2330   1.04   (0: 0.0)
2420   1.09   0.99   (1: 0.99)
2510   1.04   (0: 0.0)
2600   1.13   1.11   (1: 1.11)
2690   (0: 0.0)
2780   (0: 0.0)
2870   1.07   (0: 0.0)
2960   (0: 0.0)
3050   (0: 0.0)
3140   (0: 0.0)
3230   (0: 0.0)
3320   1.11   0.00   1.09   0.18   0.75   0.83   (5: 0.57)
3410   1.06   (0: 0.0)
3500   (0: 0.0)
3590   (0: 0.0)
3680   1.17   (0: 0.0)
3770   1.07   1.47   (1: 1.47)
3860   1.22   (0: 0.0)
3950   1.03   6.26   (1: 6.26)
4040   1.13   (0: 0.0)
4130   1.19   1.16
-----      1      2      3      4      5      6
-----   1.26   1.28   1.01   1.26   0.90   1.00
-----     34     16      4      3      2      2
[27: 1.19]

Superordinate topic:

Configuring evaluations for direct output

Information on editing:

Using the Direct output function to save evaluation results to files

Configuring the database connection for evaluations

Saving evaluations in databases