Exchange, transport and import of crime policies takes place on a global scale. New strategies of crime prevention, models of institutions and interventions rapidly spread around the globe. Knowledge is increasingly shared among the `epistemic communities' of criminologists, and criminal justice and policing experts and practitioners. Notwithstanding the global scale of exchange, criminal justice systems and policies are definitely local, and embedded in traditions, culture and the particular institutional regimes of national states. This article explores how crime policies travel within a globalized world of nonetheless local legal and institutional cultures, and how we can conceptualize the routes of travelling they take. The article starts by analysing what exactly travels when crime policies are `en route'. Next, overarching concepts and convergence theories, which have played such a decisive role in analysing the globalization of crime policies are discussed. These are contrasted with loosely coupled concepts like actors, mechanisms and principles, following suggestions by Braithwaite and Drahos (2000). `Modelling' seems to be a mechanism that is most useful in describing present exchange and transport of crime polices.