PTV Visum - Frequently Asked Questions (FAQs)
A) What is the difference between passenger trip chains, forced chainings and coupling vehicle journeys?
B) How can I create passenger trip chains for two vehicle journey sections?
C) How can I couple two vehicle journeys?
Find an example for passenger trip chains and coupling vehicle journeys here:
A) - Passenger trip chains combine two not overlapping vehicle journeys running between the stops A-B and B-C, to ensure a transition of passengers without transfer.
Note that the variant 'Forced chainings' in the data model is designated to ensure the (consecutive) chaining up of vehicle journey sections in the results of line blocking, to be served by the identical vehicle combination.
- Coupling vehicle journeys combines overlapping vehicle journeys, for example two vehicle journeys running between the stops A-B-C and A-B-D are coupled on the section A-B. They are separated in B and run alone on B-C and B-D.
B) To add passenger trip chains proceed as follows:
1) In the Timetable editor, click 'Line mode: Vehicle journey sections'.
2) Pull/adjust the sections ruler down to divide the timetable editor in a vehicle journeys pane and a vehicle journey sections pane. (Reference: User Manual 18.104.22.168 The tabular timetable window)
3) In the vehicle journey sections pane, add the attribute 'Passenger trip chain on vehicle journey section (1)'.
4) For a vehicle journey, right-click this attribute and choose in the context menu 'Edit chained up vehicle journey sections'.
5) In the dialog 'Define chained up vehicle journey sections for vehicle journey section ..', click the button 'Define chained up vehicle journey section'.
6) Optional: In the dialog 'Define chaining for vehicle journey section ..' change the filter criterion 'Only chained up vehicle journey sections with a maximum duration (empty time) of' and set it to > 5 min (e.g. 12 min). Click on 'Continue'.
7) Select this vehicle journey by clicking its attribute 'Selection'.
8) Leave with 'Finish' and 'OK'.
C) In the timetable editor, select two vehicle journeys and click the button 'Couple vehicle journeys'. This will open the dialog 'Couple vehicle journey ...'
Reference: Manual 22.214.171.124 Coupling vehicle journeys ('how to do it'), 126.96.36.199 Coupling of vehicle journeys ('what is it'), see also'Editing time profile items' in 15.32.5 Managing time profiles.