|
Note: This function will only be available if the Tour-based freight demand model add-on module has been activated ( Enabling or disabling add-ons). |
The following step-by-step instruction illustrates the typical work flow for demand calculation with the help of the tour-based freight model (Fundamentals: Tour-based freight model).
1. Construct the network model (transport supply) (Editing the network).
2. Create zones (Creating a zone).
3. Connect the zones to nodes in the network (Creating a connector).
4. Create a demand model, sectors, delivery concepts and demand strata and define their properties (Managing demand objects).
5. Specify a procedure sequence consisting of the following steps: Tour-based freight generation and distribution and Tour-based freight trip generation (Setting up and starting the procedure sequence).
6. For each procedure, set the parameters.
- Tour-based freight generation and distribution (Calculating production and distribution using the tour-based freight model)
- Tour-based freight trip generation (Calculating trip generation using the tour-based freight model)
7. To the procedure sequence, add procedures for skim matrix calculation (Calculating PrT skims and Calculating PuT skims) and, if required, for assignment and iterative repetition of the procedure sequence (Starting the iterative repetition).
8. Start the procedure sequence (Executing procedures in the procedure sequence).
The demand is calculated using the tour-based freight model.
|
Note: In the directory C:\Users\Public\Documents\PTV Vision\PTV Visum 2022/Examples, you can find an example of use on this topic. The Demand Freight example shows the structure of a tour-based freight demand model and how some parameters impact the calculation of demand. |
