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  4. Capturing Correlation in Route Choice Models using Subnetworks
 
conference paper not in proceedings

Capturing Correlation in Route Choice Models using Subnetworks

Frejinger, Emma  
•
Bierlaire, Michel  
2006
6th Swiss Transport Research Conference

When using random utility models for a route choice problem, choice set generation and correlation among alternatives are two issues that make the modelling complex. In this paper, we propose a modelling approach where the path overlap is captured with a subnetwork. A subnetwork is a simplification of the road network only containing easy identifiable and behaviourally relevant roads. in practise, the subnetwork can easily be defined based on the route network hierarchy. We propose a model where the subnetwork is used for defining the correlation structure of the choice model. The motivation is to explicitly capture the most important correlation without considerably increasing the model complexity. We present estimation results of a factor analytic specification of a mixture of Multinomial Logit model, where the correlation among paths is captured both by a Path Size attribute and error components. The estimation is based on a GPS dataset collected in the Swedish city of Borlänge. The results show a significant increase in model fit for the Error Component model compared to a Path Size Logit and Multinomial Logit models. Moreover, the correlation parameters are significant. We also analyse the performance of the different models regarding prediction of choice probabilities. The results show a better performance of the Error Component model compared to the Path Size Logit and Multinomial Logit models.

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Type
conference paper not in proceedings
Author(s)
Frejinger, Emma  
Bierlaire, Michel  
Date Issued

2006

Publisher

STRC 2006

Publisher place

strc.ch

Subjects

LArge Scale Route Choice MOdelling

•

Subnetworks

•

Error Components

•

Path Size Logit

•

Forecasting

•

STRC 2006

Note

RO 06 03 16

URL

URL

http://transp-or.epfl.ch/documents/proceedings/FrejBier06a.pdf

URL

http://www.strc.ch/pdf_2006/Frejinger_Bierlaire_STRC_2006.pdf
Written at

EPFL

EPFL units
TRANSP-OR  
Event nameEvent placeEvent date
6th Swiss Transport Research Conference

Ascona

March 15-17, 2006

Available on Infoscience
February 15, 2008
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/18405
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