Abstract
In Germany a navigation project showed how cooperation between road authorities and
navigation services can be established. Navigation systems used information and data
concerning traffic management activities to provide drivers with better route guidance and -
by doing so - to ameliorate traffic conditions.
Traffic management of public authorities can be supported by the consideration of collective
measures and information concerning traffic engineering in the navigation device on the side
of the vehicle. Public administrations develop diversion recommendations for recurring
events and disturbances. Examinations or simulations with suitable traffic models are base of
these diversion recommendations. In this way routes are recommended, which are efficient
enough to take an additional amount of traffic in specific traffic conditions.
The social acceptance of dynamic navigation systems is secured for by a route choice which
avoids sensitive areas, like residential areas etc. and primarily uses the main road network.
An instrument was developed, that makes public diversion recommendations available and
process able for individual route calculation. This so-called "Strategic Layer" is the
technological translation of road closures and diversion recommendations into a format, that
can be interpreted by a routing software. This enables the navigation device to react to
situation dependent public inhibitions or diversions.
Keywords - Route Guidance, Navigation, Traffic Management, Public Private Partnership, INVENT