How relevant is the aggregation bias with regards to mode choice?
Files
[Conference paper]
Authors
Cachaco, Fabio
Author (Corporation)
Publication date
12.05.2023
Typ of student thesis
Course of study
Collections
Type
04B - Conference paper
Editors
Alahi, Alexandre
Editor (Corporation)
Supervisor
Parent work
Conference Proceedings of the 23rd Swiss Transport Research Conference
Special issue
DOI of the original publication
Series
Series number
Volume
Issue / Number
Pages / Duration
Patent number
Publisher / Publishing institution
Swiss Transport Research Conference
Place of publication / Event location
Zürich
Edition
Version
Programming language
Assignee
Practice partner / Client
Abstract
Most travel demand models used in practice still apply a four-step approach which describes travel demand in an aggregated manner. Aggregation bias refers to the assumption that group characteristics are shared by all the individuals who are members of that group as compared to an approach that evaluates travel behaviour on the level of individuals. The use of average values applied to aggregated populations across spatial zones and time periods distorts a model’s sensitivity to investment and policy alternatives (Castiglione u. a. 2015).
Our paper examines the relevance and impact of aggregation bias with regards to trip- and tour-based mode choice. The paper starts with a short literature review and a theoretical description of the problem. The main part of the paper consists of two case studies which we have developed to quantitatively assess the relevance of the aggregation bias.
The first case study is based on synthetic data that reflects typical rates of mobility tool ownership and travel times by different modes for a given travel relation in an urban, agglomeration and rural context in Switzerland. The relevance of the aggregation bias is assessed by different ways to consider mobility tool ownership and systematic adaptations of the considered travel times.
The second case study is based on the implementation of an activity-based and disaggregated demand model for the German city of Halle based on which an aggregated model is derived that shared exact same transport network and overall travel demand. We use the two models to assess the relevance of the aggregation bias based on three scenarios with different transport planning measures.
Keywords
transport modelling, activity based transport mode, aggregated transport model, aggregation bias
Subject (DDC)
380 - Handel, Kommunikation, Verkehr
Event
23rd Swiss Transport Research Conference
Exhibition start date
Exhibition end date
Conference start date
10.05.2023
Conference end date
12.05.2023
Date of the last check
ISBN
ISSN
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the abstract
Open access category
Green
Citation
ERATH, Alexander und Fabio CACHACO, 2023. How relevant is the aggregation bias with regards to mode choice? In: Alexandre ALAHI (Hrsg.), Conference Proceedings of the 23rd Swiss Transport Research Conference. Zürich: Swiss Transport Research Conference. 12 Mai 2023. Verfügbar unter: https://doi.org/10.26041/fhnw-4862