GF82.61-P-3011T Route Calculation, Function
GF82.61-P-3011T Route Calculation, Function
- with CODE (525) MB Audio 50 APS radio
- with CODE (527) Navigation module for COMAND
The navigation processor for the radio control panel and navigation unit (A2/56), with code (525) MB Audio 50 APS radio, is integrated into the operating unit. With the COMAND operating, display and control unit (A40/3), with code (527) COMAND APS (with navigation), the external navigation module is referred to as a navigation processor (N41/1).
After entering the destination, the route is calculated and continuously updated by the navigation processor (N41/1). This can only be calculated within the digitalized map areas. The calculated route is the prerequisite of the destination guidance system.
Route calculation
The navigation processor (N41/1) calculates the trip route with the aid of the CD-ROM map data and the instantaneous position. In the calculation it takes into account the streets read from the CD-ROM map and their attributes, such as one-way streets, turn restrictions, road categories, etc. (where available).
Selectable route calculations
^ Fastest route
^ Shortest route
^ Dynamic route
If "Dynamic route" is selected, traffic messages received via radio (digital network) are stored with the aid of an integrated traffic data memory and then taken into consideration when calculating the route. The route is then calculated with the optimum time, in a manner similar to the "Fastest route" option. Notification that the route has been recalculated taking traffic messages into consideration, is provided. For the route calculation, the following stretches can be blocked from the route calculation:
^ Avoid highway
^ Avoid ferries/vehicle transport
^ Avoid toll roads
^ Avoid tunnels
The navigation differentiates between:
^ Main and intermediate destinations of a trip (driven to directly)
^ Via destinations
Via destinations
The entry of a via destination always refers to the road network. All the streets available in this network can be selected as via destinations. The via destinations are not driven to directly, i.e. the function is restricted to the highway network. The selection is always made via the map. Furthermore, control is possible from the operating unit, however also the input of a town or other index destinations can be carried out and then diverted on the map. With a via destination, the route calculation takes place to the next main destination taking the via point into consideration.
The navigation processor (N41/1) creates a list of the streets and junctions to be driven to after the route has been calculated. This route list is used for destination guidance. It may also be displayed by calling up the "Information" menu.
Route updating
If the driver deviates from the calculated route, a new route list is calculated by the navigation processor (N41/1). When doing so, the current position and the direction of travel are taken into consideration. The new route is optimized accordingly.
Journeys outside of the digitalized map area
If the vehicle leaves the digitized CD-ROM map range (e.g. traveling in a multi-level car park), routes cannot be calculated or updated. OFF ROAD appears in the display. When leaving the map boundaries (e.g. foreign countries) OFF MAP is displayed. Destinations which lie outside of the digitalized map area cannot be taken into consideration on calculation of the route.
