Transportation Systems Simulation - A Tutorial for Multi-Modal Simulation Using VISSIM/Pedestrian: Network Objects
Vissim performs pedestrian simulation based on the Wiedemann Model (Wiedemann 2009 and 1974). If the PTV software Viswalk is added on as a module, pedestrians can be simulated using the Helbing Model (Social Force) (Helbing and Molnar, 1995) or Weidemann Model. Please see the user’s manual or references section for information and publications on these pedestrian models. PTV Viswalk can also be used as a stand-alone software to simulate pedestrians without vehicles. This section focuses on the Wiedemann Model only, using Vissim 7.0 as stand-alone without the Viswalk Add-on. Vissim uses network objects to define geometry, attributes, data input to allow the model to meet the users end need. The Network Objects section introduces the pedestrian Network Objects. The Pedestrian Simulation section discusses how to place pedestrian network objects, input data, set up simulation parameters, and evaluate the model in order to create a quality model.
Pedestrian Network Objects
The pedestrian simulation network objects in Vissim are as follows:
- Areas (Polygon or Rectangle)
- Ramps and Stairs
- Pedestrian Inputs
- Pedestrian Routes
- Pedestrian Travel Times
Other Network objects that are important to pedestrian modeling are:
- Pedestrians in Network
- Priority Rules
- Signal Heads
- 3D Traffic Signals
- Static 3D Models
The tools for creating these objects can be found in the Network Objects Toolbar shown in the figure below. If desired, to view Pedestrian Object Types Only:
- Right Click anywhere in the Network Objects Toolbar and select Pedestrian Object Types Only.
- To go back to the previous view and display all the Network object types in the toolbar, simply reverse the process and select “All Object Types”.