At a national level, rail, road, cruise and aviation policies are usually developed within separate agencies in relatively compartmentalised processes, although there is often a range of consultative mechanisms that facilitate communication and coordination. Planning for airport infrastructure, for example, requires not only forecasting of international and domestic travel growth, but also an understanding of the characteristics of these markets in order to determine the level of services required and the need for connectivity between the transport hub and the destination. The effectiveness of information exchange, learning, communication and co-ordination across policy sectors therefore determines how transport interests are balanced in tourism policies, and how tourism interests are balanced in transport policies. The overall effect of these policies has been an increase in aircraft movements and passenger capacity and an expansion of air services.