Navigation system

A route planning system is provided with various interlinked facilities, including a user I/O facility, a route planning facility, a position determination facility, and a destination and institutional table facility. In particular, the route planning facility is arranged for under control of a set of interval point requests received from a user, and one or more timing indications each associated to a respective interval point request, generating a route listing that accommodates a route to be travelled to the set of interval points and associated timing indications.