You can have the settings for DRT automatically set to a simplified algorithm when calculating the timetable-based assignment of Visum(Timetable-based assignment: Extended consideration transport supply page). The computing time is significantly reduced for the following reasons:
- No tour planning is calculated.
- The assignment is only calculated once without further iterations.
The other settings, which do not affect the number of iterations, are a good starting solution for considering DRT within the public transport assignment and thus minimize the effort required for modeling. You can change the automatic settings if required.
The following settings are made for the simplified calculation in the timetable-based assignment:
Iterations tab
|
Parameters |
Value |
|
Number of assigned demand shares |
1 |
|
Number of iterations with path search |
1 |
|
Maximum number of iterations without a new path search |
0 |
DRT in general tab
|
Parameters |
Value |
|
Node aggregation |
1.0 |
|
PUDO scheme |
Only public transport connector nodes and stop area connector nodes |
|
Factors for minimum and maximum search impedance |
1 |
DRT initial values tab
|
Parameters |
Value |
|
Use fixed initial values |
Activated |
|
DRT detour factor in first search |
2 |
|
DRT wait time in first search |
10 min |
