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Defining a four-step model experiment

Technical Note #5

1 August 2014

by Margarida Delgado

The Four-step Model experiment in Aimsun allows the user to organize all of the processes in a chain. The advantages are twofold: this allows the execution of the whole experiment in one run with no need for scripting, and the experiment will help to keep track of the steps executed and relate inputs and outputs.

 



four-step model experiment in Aimsun

A four-step model experiment

 

Four-step model experiment

Each box corresponds to an input (vectors, matrices) or experiment to be executed (Generation/Attraction experiment, Distribution+Modal Split experiment, Assignment experiment). Each box also corresponds to an Aimsun object; the values and parameters must be set in the object itself (matrix, vector or experiment) and not in the Four-step Model experiment. If you want, you can change the name of the box to make the diagram more descriptive.



four-step model experiment in Aimsun

Each box corresponds to an input and an object

 

Lines connecting the boxes also contain information; you can select which information in the preceding box is relevant and should be used by the next box. Click on any connecting line to show and select the corresponding data:



four-step model experiment in Aimsun

Lines connecting the boxes also contain information

More technical notes

Cómo usar el contenido de matriz

Marzo 2017: Marga Delgado enseña a usar el contenido para agrupar matrices en subcarpetas, lo que resulta muy cómodo al trabajar con múltiples matrices.

Funciones de distribución y división modal

Enero 2018: Margarida Delgado explica que los pasos de distribución y división modal ahora son dos procesos independientes, con el objetivo de disponer de mayor flexibilidad al elegir con qué modelo trabajar y ofrecerle más control en cada paso.

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Aimsun Next 23

Aimsun (2023). Aimsun Next 23 Manual del usuario, Aimsun Next Versión 23.0.0, Barcelona, España. Acceso: 19, 2023. [Online].
Disponible en: https://docs.aimsun.com/next/23.0.0/

Aimsun Next 20.0.5

Aimsun (2021). Aimsun Next 20.0.5 Manual del usuario, Aimsun Next Versión 20.0.3, Barcelona, España. Acceso: May. 1, 2021. [En software].
Disponible: qthelp://aimsun.com.aimsun.20.0/doc/UsersManual/Intro.html

Aimsun Next 23

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edición = {​​​​​​​​​​​​​​​Aimsun Next 23.0.0}​​​​​​​​​​​​​​​,
domicilio = {​​​​​​​​​​​​​​​Barcelona, Spain}​​​​​​​​​​​​​​​,
año = {​​​​​​​​​​​​​​​2023. [Online]}​​​​​​​​​​​​​​​,
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Aimsun Next 20.0.5

@manual {​​​​​​​​AimsunManual,

título = {​​​​​​​​Aimsun Next 20.0.5 User’s Manual}​​​​​​​​,
autor = {​​​​​​​​Aimsun}​​​​​​​​,
edición = {​​​​​​​​​​​​​​​Aimsun Next 20.0.5}​​​​​​​​​​​​​​​,
domicilio = {​​​​​​​​​​​​​​​Barcelona, Spain}​​​​​​​​​​​​​​​,
año = {​​​​​​​​​​​​​​​2021. [En software]}​​​​​​​​​​​​​​​,
mes = {​​​​​​​​​​​​​​​Accessed on: Month, Day, Year}​​​​​​​​​​​​​​​,
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}​​​​​​​​​​​​​​​

Aimsun Next 23

TY – COMP
T1 – Manual del usuario de Aimsun Next 23
A1 – Aimsun
ET – Aimsun Next Version 23.0.0
Y1 – 2023
Y2 – Acceso: Mes, Día, Año
CY – Barcelona, España
PB – Aimsun
UR – [En software]. Disponible en: https://docs.aimsun.com/next/23.0.0/

Aimsun Next 20.0.5

TY – COMP
T1 – Manual del usuario de Aimsun Next 20.0.5
A1 – Aimsun
ET – Aimsun Next Version 20.0.5
Y1 – 2021
Y2 – Acceso: Mes, Día, Año
CY – Barcelona, España
PB – Aimsun
UR – [In software]. Available: qthelp://aimsun.com.aimsun.20.0/doc/UsersManual/Intro.html