managing director

Griet De Ceuster has founded Transport & Mobility Leuven in 2002 and is managing director since then. She is involved in long term forecasts, cost-benefit analysis of transport infrastructure and indicators for sustainable mobility. The past 15 years, she was involved in more than 100 research programmes and studies across Belgium and Europe.  She is a frequent speaker, reviewer and expert. Griet De Ceuster is a MSc in Civil Engineering and specialized in  traffic engineering and economics at the TU Delft and KU Leuven.

+32 16 31.77.30

project management

Veerle Vranckx has a Bachelor in office management, and completed her studies with a postgraduate degree in European management. She also has a certificate of 6 years Spanish obtained at the CLT, Leuven. She started working at TML after a career of 10 years at IMEC, where she executed several administrative tasks. At TML, she works as administrative project coordinator and assures the follow-up of the different projects. She was also responsible for the website maintenance and the newsletter until 2017.

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Bregtje Proost has a Master’s degree in translation English-Russian.  She completed her studies with a postgraduate degree in business economics and – management. For the past 7 years, Bregtje was responsible for the communication of the Centre for Language and Education, a project organisation linked to the KU Leuven.  Within this environment, she played a significant role in the dissemination of research projects via various on- and offline information channels.  She puts her experience in knowledge communication further into practice within TML.

Bregtje Proost

accountancy & administration

RafaŽl Lefebvre holds a degree in business management and accountancy. He manages the financial and related administrative activities at TML. He assures a smooth invoicing process and a correct cost allocation – including all the financial administration linked to our larger and more complex European projects. Prior to joining TML, RafaŽl worked as a project leader in IT service management.

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RafaŽl Lefebvre 


Lars Akkermans holds a Master in Psychology. Lars works as researcher at TML specialised in modelling human behaviour. His main area of expertise is the analysis of the mobility and safety effects that result from the introduction of new technologies and policies. Changes in human behaviour, and the associated impacts on society and the environment are central in his work. Past projects include the effects from vehicle technology, road infrastructure, legislation (both national and European) on mobility, and as such includes the monetisation of costs and benefits. Before joining TML, he worked for the Belgian Road Safety Institute and TNO Human Factors as a researcher, specialised in road safety.

+32 16 31.77.34
Tim Breemersch holds a Master in Applied Economics and obtained an additional Master in Environmental Science and Technology. He started his career as a Business analyst for DHL international and joined the team of Transport & Mobility Leuven in 2007. At TML, he specialized in the modelling and economic evaluation of transport and environmental policies. His research is oriented towards energy efficiency and the emissions of passenger and freight transport; both on a regional as well as on an international (European) level. Combining his economic and technical background, Tim has been engaged in projects assessing the impact of policy changes on the competitive position of different transport modes, with a specific focus on road (freight) transport on a macro level. On a micro level, Tim has been involved in several social cost benefit analyses of (transport)infrastructure.

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Kristof Carlier is civil engineer and is EIR expert for the Flemish Government, assigned to draw up reports on environmental effects related to mobility. After completing a project at the KU Leuven, he has worked for TNO (NL) and MINT as consultant. He is active in the field of traffic simulation and transport modelling. He cooperated on numerous projects using microsimulation models, the macroscopic model OmniTRANS, applications with the Flemish strategic transport models, and several freight transport models. He is also experienced in calculating transport-related emissions an in road works management of large infrastructure projects.

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Kristof Carlier
Ruben Corthout is a civil engineer, specialised in traffic modelling.  He obtained a PhD in Engineering at the Traffic & Infrastructure group at the KU Leuven. With an emphasis on intersection modelling and congestion dynamics, he specialized in traffic simulation models. He works at TML as a researcher on regional,  European and urban transport and traffic models, focusing on the theoretic development as well as the practical application and result analysis.

+32 16 74.51.27
Ruben Corthout
Hanne De Naegel graduated as a MSc in Engineering in transport, logistics, and intelligent transportation systems. For her thesis she investigated the prioritisation of public transport at intersections controlled by traffic lights. After her studies she started working at Eurostation on mobility studies for various station projects. She is experienced in macroscopic traffic models and the development of transportation simulation models. She works at TML as a traffic engineering researcher.

+32 16 74.51.24
Eef Delhaye is senior researcher at TML and specialized at transport economics. Her main areas of work and responsibilities deal with Social Cost Benefit Analyses, external costs, traffic safety, the development of indicators and the effects of (transport) policy on environment and society. Eef holds a PhD degree of Science in Economics, obtained at the KU Leuven. During her PhD she also worked on several European projects.

+32 16 74.51.22
Dirk Engels is Master of Science in Transport Engineering (obtained at the KU Leuven) and is EIR expert for the Flemish Government, LNE, in the field ‘Human’, Mobility, assigned to draw up a report on environmental effects. He also followed a post graduate course ‘Urbanism and Spatial Planning’. He worked for 25 years for TRITEL as a project manager and director. He supports TML as independent mobility expert with his broad expertise in the design and management of traffic systems and traffic modelling. He played an active role in a wide range of studies on urban; regional and EU level making mobility impact studies and Sustainable Urban Mobility Plans and designing multi-modal transport systems. He also participated actively in a large number of studies on EU level as Evaluation Manager , Project manager or supporting expert ( e.g. CHAMP, QUEST, CIVITAS ELAN, CIVITAS VIVALDI, …). 

+32 16 31.77.31
Dirk Engels
Rodric Frederix obtained a Master’s degree in civil engineering. After his studies, he obtained a PhD in Engineering Sciences at KU Leuven. During that time, he specialised in the estimation of traffic demand within large transportation networks. He was also involved in the development and application of macroscopic traffic models which are used to map out the traffic flow within cities and regions. In this respect, he acquired useful experience regarding the functioning of traffic lights in relation with traffic flow. At TML, Rodric further specialised in the development of intelligent traffic lights, and supports the Flemish government and various cities and towns with its implementation in Flanders. Next to that, he continues to develop macroscopic traffic models for the Flemish region.

+32 16 74.51.25
Rodric Frederix
Christophe Heyndrickx is bio engineer in Environmental and Agricultural Economics and holds a Master degree in Advanced Economics. He specializes in modelling regional and national economic policy, using applied general equilibrium modelling. In that capacity he was involved in several model development projects; both on a national as well as on a European level. These projects covered a wide variety of topics, including: cross-border transport project assessment, energy policy, climate change impacts, urban development, public transport policy and internalization of external costs of transport. Christophe has been project manager of two large-scale EU projects and several smaller national projects. He’s currently finishing a PhD on urban transport modelling.

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Willem Himpe is a civil engineer, specialized in traffic. After his studies, he obtained a PhD degree in the engineering sciences at the KU Leuven. During his research, he developed dynamic traffic assignment algorithms. He is competent in the use of innovative data sources, network analysis techniques and behavioural models. Willem is currently combining his work at TML with a part time employment as doctoral assistant at the KU Leuven.

+32 16 95.71.52
Sven Maerivoet holds a PhD degree in traffic engineering. Within TML he is a member of the Data Enrichment Group. His expertise mainly lies in transportation planning models, traffic flow theory, giving courses and lectures, numerical and statistical analysis of various big data, travel time loss functions, multi-agent systems, sustainability effects in cities, external costs of road congestion, the related parking problems and innovative technological solutions, intelligent transportation systems (ITS), road user charging, autonomous vehicles, Open Data, Mobility-as-a-Service, and Smart Cities. He is also an active member of several working groups in the ITS Belgium organisation, former member of the advisory council of the Flemish Institute for Mobility (VIM), and regular reviewer for various scientific journals en conferences.     

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Inge Mayeres has a PhD in economics (KU Leuven). She worked at VITO and at the Belgian Federal Planning Bureau. Before that she was a postdoctoral researcher of the Fund of Scientific Research Flanders and did research at the Centre for Economic Studies of the KU Leuven. During her career she has made economic evaluations of various aspects of transport policy. For example she analysed innovative transport pricing systems such as road pricing, the reform of car taxation, the effects of environmentally harmful transport subsidies, the international benchmarking of local public transport, the service quality at public transport nodes and the interaction between transport and spatial policy. In addition, she has expertise in European transport policy, the development of long term transport outlooks and the determinants of the external costs of transport.    

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Inge Mayeres
Pťter I. PŠpics has a PhD in Astronomy and Astrophysics (KU Leuven), and a ten-year experience in academic research (including a postdoctoral position funded by the FWO) with over 50 well-cited publications in international peer-reviewed journals. His work - involving the analysis, interpretation, and modelling of large data sets - has contributed to a better understanding of the internal structure of massive stars, and the physical processes that govern their lives. He joined TML in 2018 looking for a new challenge where he can apply his expertise and grow further in a field that is directly relevant for both our society and our environment. His first objective is evaluating strategies that cities could follow to minimise harmful transport-related emissions using complex quantitative models (as part of the CLAiR-City project)..    

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Pťter Papics
Prof. Stef Proost works as independent economic expert for TML. He holds a licentiate and Master in Economics, as well as a PhD in Economics. Stef is full professor of Economics at the KU Leuven and teaches transport, energy and environment economics at the Faculty of Economics and Business and at the Engineering Faculty. His areas of expertise are economic analysis of energy, environment, transport, public economy problems using quantitative approaches including the multi-level government dimension.

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Gitte Van Den Bergh graduated with a degree in Physics and also obtained a degree in Additional studies in Informatics. After her studies she joined TRITEL (later Tractebel Engineering), where she specialised in the use and development of macroscopic traffic models. She also contributed to the development of various urban models, the modelling of port-related traffic flows and the simulation of parking behaviour. Currently she works at TML as a researcher in traffic and transport models.

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Gitte Van Den Bergh
Jeroen Vanbiervliet is a bio science engineer graduated in biosystems. He learned to model (biological) processes quantitatively and analyse the results of those models. After his studies he started at TML as a  junior researcher supporting senior researchers with a focus on the theoretical development and practical application of traffic models.

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Sebastian Vanderlinden graduated with a degree in economics at the KU Leuven and completed graduate studies in Louvain-la-Neuve. After having worked as a research assistant at the faculty of economics of the KU Leuven and as a macro-economic analyst at the Belgian export credit agency, he joined TML as a junior researcher in 2017. Sebastian is particularly interested in issues related to sustainable mobility policies.

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Sebastian Vanderlinden
Kris Vanherle is a biochemical engineer and holds a Master degree in Environmental Sciences. He is a Senior Researcher at TML focusing on the impact assessment of transport policies. He has broad expertise with particular focus on transport emissions of greenhouse gases and air pollutants and has managed several studies for European national governments on behalf of TML. A key research field in which Kris is active, is the quantification of emissions by various transport modes and the assessment of policy measures on transport emissions. To this end, he developed and managed various emission models (e.g. EMMOSS, TREMOVE, and MOVEET). Kris is regularly involved in impact analyses of various measures to reduce the environmental impact of transport (e.g. eco-taxation, CO2 standards, subsidies for new green technologies, scrappage schemes, and electric vehicle incentives) using quantitative models. He is also in charge of TML’s in-house modelling assessment tools, keeping them up to date with the latest developments in the market.

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Filip Vanhove is Master in Civil Engineering. In his Master’s thesis, an analysis was made of the Parkpoort crossroads using the micro simulation model Aimsun2. Later on, he completed a number of projects using Paramics, including the analysis of dynamic traffic management. He also has experience with macroscopic traffic models, amongst others for the computation of emissions of air pollutants and for noise calculations. Through the development and compilation of statistics, he gained a thorough knowledge of the traffic situation on the Belgian motorway network and learned how to handle large amounts of data. Recently he is mainly working on emission modelling of road traffic, inland shipping, maritime transport, rail and aviation.

+32 16 31.77.35
Bruno Van Zeebroeck is coordinating transport and mobility projects for regional, federal, national and European public authorities for more than 10 years. His projects concern emission and external costs calculations, welfare impacts, social cost benefit analysis, electric mobility… He is particularly interested in the high societal benefits for our mobility system of active mobility (like cycling) and light electric vehicles (like pedelecs). He obtained a Master’s degree in Business Engineering, completed his studies with a “diplŰme en affaires publiques” at the UCL in Louvain-La-Neuve and took courses in traffic science, environmental and transportation economics. Before joining TML, he worked within the Belgian Federal Planning Bureau at the establishment of green national accounts.

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Bruno Van Zeebroeck