OPTIC is a high level policy support activity that will consolidate and extend knowledge for policy-making in the process of construction and implementation of optimal packages of transport policy measures. It includes,- critical reviews of existing studies and theories about policy interactions in the field of policy packaging- improvement to existing models and assessment tools in reflecting such interactions, taking into account the impact on transportation itself and on socio-economic issues- combined practitioner/research workshops to involve stakeholders and identify best practices from existing cases of “policy packages”- dissemination of knowledge and experience to ease implementation and make it more effectiveOPTIC will help improve and optimise the use of existing infrastructure through more efficient, combined use of policy tools, and encompasses best practices within different fields of transport policy making. A strong emphasis on training, dissemination and user involvement is maintained throughout the project through a series of activities including a webpage, a transport conference session, academic publications, targeted workshops and newswire services.