Episode Generation

The episode generation for GTAModel is based on 262 different distributions extracted from the TTS survey. In this section we are going to see how we can adjust the generation rates in order to better fit to your model's area.

Tip

Documentation on how map Distribution IDs to activities can be found here.

You can find the list of modules to adjust the generation rates at Scheduler/Generation Rate Adjustments within GTAModel V4.1.

You can add as many GenerationAdjustment modules as required. This module has 4 parameters.

Parameter	Description
Distribution ID Range	Takes in a range set for the distributions you would like to modify
Factor	Is a multiplier to assign to all non-zero frequencies, controlling the generation rate
Planning Districts	Takes in a range set for the person's home zone
Work Planning District	Takes in a range set for the person's work zone

An unemployed person 'works' in planning district 0. If there are multiple generation rate adjustments that cover the same activity distribution and home and work planning districts, the adjustment that comes first in the list will be applied.

Warning

When adjusting the factor for work trips, remember that an individual can only make a single Primary work episode. This will force you to iterate while tuning the generation rates.

The results of episode generation can be found in the Microsim data within the Trips table.