Parameters of the Generate trip requests procedure

Select this option to delete existing trip requests when the procedure is executed.

Generate trip requests only for demand between active zones

Select this option to generate trip requests between active zones only.

From-time To-time

Use these input fields to specify the time period for which trip requests are generated from the demand. The time period refers to the beginning of the walk link that belongs to the trip request to the pickup node. This time may lie before the desired departure time of the trip request.

Scale demand with the following factor In the input field, specify the factor with which the demand is to be scaled.

Note

Two possible use cases for the factor:

• Content scaling: You only want to disaggregate a share of another demand matrix into trip requests. For example, 20% (0.2) of today's public transport users use the demand-responsive transport system.
• Time scaling: You want to use the demand of an hourly matrix for a period of four hours, for example. In this case, you must scale the demand with a factor greater than 1, for example with 4.

Enter numbers in the Weight column to determine how the number of passengers traveling together is distributed per trip. The percentage in the Share column is calculated automatically from the entries in the Weight column.

In the table, you can create a distribution for the pre-booking period when generating trip requests. The pre-booking period is the time between the arising of the trip request and the desired departure time. In the columns Lower limit, Upper limit, and Weight, enter values that define a pre-booking time interval. Values from 1 minute to 2880 minutes (48 hours) are permitted for the interval limits. The values of the individual intervals must not overlap. Use the Create and Delete buttons to insert new rows or delete existing ones.

Maximum wait time

Indication of the maximum time that passengers of the trip request have to wait.

A zone can be assigned the following From- and To-nodes:

• Nodes with an active connector to the zone

Select this option to assign only nodes with an active connector to the zone.

• Nodes in the zone polygon

Select this option to assign the node to the zone in whose polygon it is located. If there are several zones, the zone is assigned whose centroid is closest to the node.

The value in the Buffer box specifies the minimum distance at which the node must be located to the centroid.

• Nodes for which the zone number is contained in the following node attribute

Select a node attribute whose value corresponds to the number of the zone that is assigned.

You can also assign a node to multiple zones by selecting a string attribute whose list of zones is a comma-separated list. Example: An attribute with a value of 3, 5, 7 causes the node to be assigned to zones 3, 5, and 7.

• Demand share

Select a node attribute that determines the share of demand received by each node assigned to the zone.

Note

The attribute acts as a weight. If, for example, three nodes with the weights 1, 2, 3 are assigned to a zone, then the first node is assigned 1/6, the second node 2/6, and the third node 3/6 of the demand at the zone.