This entity offers information about relevant international hubs between the origin and destination of a planned trip and static routing solutions between these hubs. In case of two adjacent (i.e. sharing a common border) services, the IRS will cover the routing between the relevant exchange points from the list of static solutions. In case the local systems do not share a common border (i.e. remote), the routing between the relevant exchange points will be calculated by this entity.

The central node and the International Routing Service together form the Danube Region Journey Planner (DRJP), which is the entity to be developed in LinkingDanube.

In case the local systems are overlapping, the system with extended coverage could cover the routing between the exchange points without the necessity to involve the IRS (this is a requirement for the local journey planners).

Further function: The IRS requests actual exchange points/hubs from local routing systems directly (ExchangepointRequest). In regard to the upscaling of the system, this function is needed to evolve to a more distributed system, also in terms of exchange points. The precondition is that local routing system(s) could provide necessary data and supports ExchangepointRequest from the OpenAPI.