Directives for new-generation fuel economy devices : project modern drive devices / C.J.G. van Driel, F. Tillema, M.C. van der VoortImpacts of a congestion assistant on driving behaviour, workload and acceptance : results from a driving simulator study / C.J.G. van Driel, B. van AremDriver support in congestion : an assessment of user needs and impacts on driver and traffic flow / Cornelia Jacoba Geertje van DrielDriver support in congestion : an assessment of user needs and impacts on driver and traffic flow / Cornelia Jacoba Geertje van Driel