Advent Navigation Owner's Manual page 112

Road types used or avoided in route calculation:
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Whenever data exist, route calculation takes into account statistical traffi c data for
the given day of week and time of day.
Real-time Traffi c events are also taken into account and sometimes greatly modify
the route.
iGO primo automatically recalculates the route if you deviate from the proposed
itinerary or if a newly received Traffi c event concerns a part of the recommended
route.
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