Increased mobility, more time spent away travelling to and from work, more frequent overseas holidays, incremental business travel, spiralling passenger numbers, are all factors driving the growth of the international Out-of-Home audience.  Knowing what makes up this vast audience, by segment, by purpose of journey, by socio-economic group, by educational status, and by other demographic filters available, forms part of this key insight. Knowing how they behave as consumers and helping advertisers connect effectively with them, is the purpose of this insight.