Publications
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Activity-based model for medium-sized cities considering external activity–travel: Enhancing FEATHERS framework Hasselt University
Travel demand modeling has evolved from the traditional four-step models to tour-based models which eventually became the basis of the advanced Activity-Based Models (ABM). The added value of the ABM over others is its ability to test various policy scenarios by considering the complete activity–travel pattern of individuals living in the region. However, the majority of the ABM restricts residents’ activities within the study area which results ...
Calibrating Activity-based Models With External OD Information: An Overview Of Different Possibilities Hasselt University
Many practitioners question the advantages of activity-based models over conventional four-step models in terms of replication of traffic counts. Therefore, in this paper, a framework is highlighted that actively links travel demand models in general, and activity-based models in particular, with traffic counts. Two approaches are presented that calibrate activity-based models with traffic counts, namely an indirect and a direct approach. The ...
Calibrating Activity-Based Models with External Origin-Destination Information Overview of Possibilities Hasselt University
Many practitioners question the advantages of activity-based models over conventional four-step models in regard to replication of traffic counts. This paper highlights a framework that actively links travel demand models in general and activity-based models in particular with traffic counts. Two approaches are presented that calibrate activity-based models with traffic count-an indirect and a direct approach. The indirect approach tries to ...
Modeling framework for incorporating external trips in activity-based travel demand models Hasselt University
Special issue on ambient systems, networks and technologies Hasselt University
attracted a good number of scientific papers that contributed to the state-of-the-art in the areas of these conferences' themes. All the papers selected for this special issue have been extended from their original versions and underwent two rounds of rigorous peer-review process. Based on the reviewers' feedback , as well as the evaluations of the Guest Co-editors, 21 papers were selected for this special issue from 35 invited submissions. The ...
Assessing the Quality of Origin-Destination Matrices Derived from Activity/Travel Surveys: Results from a Monte Carlo Experiment Hasselt University
To support policy makers combating travel-related externalities, quality data is required for the design and management of transportation systems and policies. To this end, large amounts of money have been spent on collecting household and person-based data. The main objective of this paper is to assess the quality of origin-destination matrices derived from household activity/travel surveys. To this purpose, a Monte Carlo experiment is set up ...
How Does Consumers’ Omnichannel Shopping Behaviour Translate into Travel and Transport Impacts? Case-Study of a Footwear Retailer in Belgium Vrije Universiteit Brussel
Retailers and consumers are increasingly “omnichannel”. This means that retailers offer multiple integrated offline and online channels to their customers, while consumers use multiple offline and online channels throughout their shopping journeys. In these shopping journeys, consumers can travel for researching, testing, receiving and returning activities related to a purchase, next to the purchasing itself. It is unclear how such omnichannel ...
A GPS-based approach to measure the environmental impact of construction-related HGV traffic on city level Vrije Universiteit Brussel
Construction logistics (CL) is assumed to represent 20-35% of total urban freight traffic and account for a significant share of environmental nuisances. However, methodologies used so far make abstraction of travelled vehicle-kilometres (vkm), hence inadequately determining the true environmental impact of off-site CL activities. In turn, the lack of baseline assessments renders the development of sector-specific transport policies difficult. ...
Door-to-door transit accessibility using Pareto optimal range queries Hasselt University
Public transit is a backbone for well-functioning cities, forming a complicated system of interconnecting lines each with their own frequency. Defining accessibility for public transit is just as complicated, as travel times can change every minute depending on location and departure time. With Pareto optimal journeys it is possible to look beyond the earliest arrival times and also optimize for the shortest travel time, as travellers base their ...