In this Workflow step, you will enter the Trip Generation data for each development Zone in the network in a tabular setup. The data entry is all user-defined with calculations completed based on your entries.
In the upper right corner of the workflow, the position of the Trip Generation table can be switched to the horizontal or vertical position using the ‘Switch Table Position’ for a better view of the table.
Data entry is similar to other data tables in the Workflow Panel, using text and numerical entries, drop-down lists, and checkboxes, as shown in the figure below. Each of the trip generation entries are described in Table 15: Trip Generation Parameters.
Figure 19: Trip Generation Table
Table 15: Trip Generation Parameters
|
Parameter |
Description |
Details |
|
No |
Zone number |
|
|
Name |
Zone name |
Project name |
|
Land Use |
Description of land use type |
Examples include single family residential, office, retail, etc. |
|
Land Use Code |
Code number for referencing land use type |
Example would be use of ITE land use code from Trip Generation Manual |
|
Data Entry |
Rate or Trips. When using the ITE Trip Gen App API, Rate yields trips from the Rate method, and Trips yields trips from the Fitted Curve Method. |
Users can enter either a trip generation rate or directly enter the number of trips |
|
Independent Variable |
Variable that is the basis of the trip generation rate |
Examples include dwelling units, thousand square-feet of leasable area, occupied hotel rooms, students, etc. |
|
Trip Generation Rate |
Trip generation rate per independent variable, for the time period of analysis |
|
|
Quantity |
Quantity of the Independent Variable |
|
|
% In |
Percentage of trips that are inbound to the Zone |
|
|
% Out |
Percentage of trips that are outbound from the Zone |
|
|
Trips Generated |
Number of trips generated |
Product of Independent Variable x Trip Generation Rate x Quantity |
|
Trips In |
Number of trips generated inbound to the Zone |
Product of Trips Generated x % In if Data Entry = Rate, or user entered value if Data Entry = Trips |
|
Trips Out |
Number of trips generated outbound from the Zone |
Product of Trips Generated x % Out if Data Entry = Rate, or user entered value if Data Entry = Trips |
|
Trip Type |
Trip added to or removed from the network |
Added should be selected for all new trips to the network (i.e., from new development projects); Removed should be selected for trips to be removed from the network (i.e., to represent existing trips from a land use that will be removed). |
|
Analyze |
Checkbox to select if Zone should be analyzed or not in current scenario |
When checked, trips from the Zone will be generated for the current scenario. |
|
Comment |
Comment field for user text entry |
|
|
ITE TripGen |
After log in, this link Edit opens Vistro’s ITE Trip Gen API dialog to interface with the ITE Trip Gen App data. This can also be accessed with a right-click of the context menu on each data row. |
The trip generation data are applied, along with the trip distribution data entered in the Trip Distribution Workflow Task Table (section Trip Distribution) and the Path percentages entered in Trip Assignment Workflow Task Table (section Trip Assignment), to determine the traffic assignments on the network.
