managing director

Griet De Ceuster is general manager of Transport & Mobility Leuven. She is involved in long term forecasts, policy evaluations and indicators for sustainable mobility. In 2005, Griet De Ceuster was the project leader of the mid-term assessment of the White Paper of transport for the European Commission. She is also leading transport- and emission modelling studies for the Flemish and Belgian government, and for the European Commission (TREMOVE model). She was involved in several research programmes on road congestion indicators, long term transport prognoses, pricing issues, external costs and transport technologies. Griet De Ceuster studied traffic engineering and economics at the KU Leuven and the TU Delft.

+32 16 31.77.30

project management

Veerle Vranckx obtained her degree in office management in Heverlee, and completed her studies with a degree in European management in Kortrijk. She also has a certificate of 6 years Spanish obtained at the CLT, Leuven. She started working here 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 is also responsible for the website maintenance and the newsletter.

+32 16 74.51.20

accountancy & administration

Leen Verbist studied Tourism. After having experience as a secretary at different companies, she started as a management assistant at Fost Plus. This is an organisation which promotes, coordinates, and finances the selective collection, sorting, and recycling of household packaging waste. Leen executed several administrative tasks for 17 years at Fost Plus, and during the last years her tasks became more IT- and accountancy-related. With this experience and knowledge, Leen works in TML, where she takes charge of the accountancy and administration.

+32 16 74.51.26


Lars Akkermans holds a master in Psychology. Currently, he is working as researcher at TML specialised in modelling human behaviour. His main area of expertise concerns the analysis of the implications of road safety measures and (transport) policy on human behaviour, society and the environment. Before joining TML, he worked for the Belgian Road Safety Institute and TNO Human Factors as a researcher for different European projects related to road safety as well as an analyst of different national and international measures in the field of enforcement, human interaction and technical advances in road safety. Merging theoretical models and measurable effects and implications has been a major part of his work in the field of safety and sustainability.

+32 16 31.77.34
Thomas Blondiau is transport economist at TML. He has strong expertise in economic aspects of regulation, environmental economics and quantitative economics (statistics, econometrics and economic modelling). He works on a variety of topics such as cycling policy, air traffic management, freight transport using various transport modes (truck, train, water), transport emissions, etc. He works for national and international clients. Previously, Thomas obtained a PhD in economics for a dissertation on environmental policy and its enforcement. In his research, he used techniques from law & economics, environmental economics, econometrics and economic modelling. After that, he worked for 2 years as researcher/consultant with a focus on economic policy advice on green topics (waste/recycling policy, green business models, ...) and on projects with a strong analytical component (statistics, econometrics).

+32 16 31.77.38
Thomas Blondiau
Tim Breemersch holds a master in Applied Economics and a master degree in Environmental Science and Technology. He worked as a Business analyst for DHL international and is now working for TML specializing in the modelling and economic evaluation of environmental policies. His research is oriented towards energy efficiency and emissions of passenger and freight transport, both on a regional and international (European) level. The TREMOVE model, of which Tim is one of the managers and developers for TML, is a frequently used tool in these projects. Combining his economic and technical background, at macro level Tim has worked on assessing the impact of policy changes on the competitive position of different transport modes. On micro level, he has been involved in several social cost-benefit analyses of (transport)infrastructure.

+32 16 74.51.23
Kristof Carlier is civil engineer. 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 and the macroscopic model OmniTRANS. He also cooperated on a number of new model developments and calibrations: a national model for assessing reliability, a tool for assisting the integrated design of transport infrastructure and spatial developments. He coordinated the development of a multimodal passenger transport model and he migrated and improved the Flemish multimodal transport modelling approach from the Cube Voyager environment to OmniTRANS. He is also experienced in calculating transport-related emissions.

+32 16 31.77.36
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
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 MER 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 graduated in 2007 as a Civil Engineer at the KU Leuven, after which he started a PhD in Transport Engineering. During his doctoral research, he specialized in the development of specialized algorithms for the calibration of the demand side in traffic models. He also gained experience in the development and application of macroscopic traffic models. Since 2012 he works for TML, where he has been working on the further development of several applied general equilibrium models such as EDIP and ISEEM. He is also responsible for the impact assessment using these applied general equilibrium models in several national and European projects.

+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. He was involved in several model development projects on national and European level and is responsible for the further development of applied general equilibrium modelling at TML. He was involved in the calculation of indices for the social, environmental and economic sustainability of transport and sustainable development of the economy in general. 

+32 16 74.51.21
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), and road user charging. He is also an active member of several working groups in the ITS Belgium organisation, member of the advisory council of the Flemish Institute for Mobility (VIM), and reviewer for various scientific journals.    

+32 16 31.77.33
Alloysius Joko Purwanto is a civil engineer from Indonesia with experience in evaluation and feasibility studies of several transport infrastructure projects of the country. He also holds master and doctoral degrees from France in transport economics with social sustainability in transport and mobility as his speciality. He has worked as well as research fellow in transport and energy sectors at the DG Joint Research Centre - Institute for Prospective Technological Studies of the European Commission in Seville, Spain. At TML, he works as researcher in transport and emission modelling.

+32 16 31.77.37
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.

+32 16 74.51.28
Gitte Van Den Bergh
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 and rail.

+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 “diplôme 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.

+32 16 31.77.32
Bruno Van Zeebroeck 
Isaak Yperman has a PhD degree in Civil Engineering from the KU Leuven. He developed the “Link Transmission Model for Dynamic Network Loading”, a traffic simulation model for both motorways and urban roads that realistically describes traffic- and queue propagation in large traffic networks. At TML he is analysing traffic data and developing/implementing transport models. His specialism is in impact assessments of a wide variety of transport measures and policies, both in the urban and regional context.

+32 16 74.51.24