Modeling pedestrian inputs

You can define pedestrian inputs for pedestrian areas. In the pedestrian input attributes, you can enter the volume and allocate one or several pedestrian compositions (Defining pedestrian inputs). If you allocate a pedestrian composition with one pedestrian type each to several pedestrian flows on an area and select Volume type > Exact, you can exactly define the number of pedestrians used in this area. During the simulation period,Vissim generates single pedestrians for pedestrian inputs at a random point of time based on pedestrian compositions and the volumes entered.

You can create time intervals for pedestrian inputs and thus determine the volume for each time interval in a pedestrian input. You enter the volume for a pedestrian input as pedestrians per hour. Here you can select whether the exact number of pedestrians is entered or Vissim selects the number stochastically based on the volume entered. You must always enter the number of pedestrians per hour, even if the time interval is shorter or is 3.5 hours, for example.

The time when the pedestrian enters an area in the Vissim network is defined by Vissim stochastically: An average time gap between two pedestrians results from the hourly volume. This average time gap is used as an average value of a negative exponential distribution. Vissim obtains the time gaps from this distribution which relates to a Poisson distribution. In real life scenarios, the entry time may be subject to greater variability than in Vissim on the basis of the Poisson distribution.