The influence of aggregation level and category construction on estimation quality for freight trip generation models
Artikel i vetenskaplig tidskrift, 2018

This paper analyzes the impacts of aggregation level and category construction on the relevance and quality of freight trip generation (FTG) models. More precisely, constant generations and functional form models are compared, as well as activity and activity-workforce categories. The paper proposes a method to compare constant generation and functional form models on different category classifications based on MAPE estimations. Functional forms are assessed via linear regression and compared using Pearson coefficient. Results show that the aggregation level has not always a positive impact on the model’s accuracy and the choice of suitable functional form leads to more accurate models.

aggregation level

error assessment

comparative analysis

Freight trip generation


Jesus Gonzalez-Feliu

Ivan Sanchez-Diaz

Chalmers, Teknikens ekonomi och organisation, Service Management and Logistics

Transportation Research Part E: Logistics and Transportation Review

1366-5545 (ISSN)


Produktionsteknik, arbetsvetenskap och ergonomi

Annan maskinteknik

Transportteknik och logistik





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